{"id":12,"date":"2017-03-04T03:17:36","date_gmt":"2017-03-03T19:17:36","guid":{"rendered":"http:\/\/www.zhangyijun.com\/?p=12"},"modified":"2017-03-04T03:17:36","modified_gmt":"2017-03-03T19:17:36","slug":"l2tpipsec%e4%b8%80%e9%94%ae%e5%ae%89%e8%a3%85%e8%84%9a%e6%9c%ac","status":"publish","type":"post","link":"http:\/\/www.zhangyijun.com\/?p=12","title":{"rendered":"L2TP\/IPSec\u4e00\u952e\u5b89\u88c5\u811a\u672c"},"content":{"rendered":"

\t\t\t\thttps:\/\/teddysun.com\/448.html<\/p>\n

 <\/p>\n

\n

L2TP\/IPSec\u4e00\u952e\u5b89\u88c5\u811a\u672c<\/a><\/h1>\n
<\/i> \u6280\u672f<\/a><\/span> <\/i> \u79cb\u6c34\u9038\u51b0<\/a><\/span> 546 \u6b21\u5410\u69fd<\/a><\/span><\/div>\n<\/header>\n
<\/div>\n
\"Great<\/a>\u672c\u811a\u672c\u9002\u7528\u73af\u5883\uff1a<\/strong>
\n\u7cfb\u7edf\u652f\u6301\uff1aCentOS6+\uff0cDebian7+\uff0cUbuntu12+
\n\u5185\u5b58\u8981\u6c42\uff1a\u2265128M
\n\u66f4\u65b0\u65e5\u671f\uff1a2017 \u5e74 02 \u6708 25 \u65e5<\/p>\n

\u5173\u4e8e\u672c\u811a\u672c\uff1a<\/strong>
\n\u540d\u8bcd\u89e3\u91ca\u5982\u4e0b
\nL2TP\uff08Layer 2 Tunneling Protocol\uff09
\nIPSec\uff08Internet Protocol Security\uff09
\nIKEv2 (Internet Key Exchange v2)
\n\u80fd\u5b9e\u73b0 IPsec \u7684\u76ee\u524d\u603b\u4f53\u4e0a\u6709 openswan\uff0clibreswan\uff0cstrongswan \u8fd93\u79cd\u3002
\nlibreswan \u662f\u57fa\u4e8e openswan \u7684 fork\uff0c\u6240\u4ee5\u73b0\u5728\u5404\u4e2a\u53d1\u884c\u7248\u57fa\u672c\u5df2\u7ecf\u770b\u4e0d\u5230 openswan \u7684\u8eab\u5f71\u4e86\u3002
\n\u5f53\u7136\u4e5f\u6709\u4f7f\u7528 strongswan \u7684\u3002<\/p>\n

\u4e4b\u6240\u4ee5\u8981\u66f4\u65b0 L2TP \u4e00\u952e\u5b89\u88c5\u811a\u672c\uff0c\u662f\u56e0\u4e3a\u968f\u7740\u5404\u4e2a Linux \u53d1\u884c\u7248\u4e0d\u65ad\u63a8\u9648\u51fa\u65b0\uff0c\u539f\u6709\u7684\u811a\u672c\u5df2\u7ecf\u4e0d\u9002\u5e94\u73b0\u5728\u7684\u9700\u6c42\u3002
\n\u672c\u811a\u672c\u901a\u8fc7\u7f16\u8bd1\u5b89\u88c5\u6700\u65b0\u7248 libreswan \u6765\u5b9e\u73b0 IPSec\uff08CentOS7 \u4e0b\u5219\u662f\u5168\u90e8 yum \u5b89\u88c5\uff09\uff0cyum \u6216 apt-get \u6765\u5b89\u88c5 xl2tpd\uff0c\u518d\u6839\u636e\u5404\u4e2a\u53d1\u884c\u7248\u7684\u4f7f\u7528\u65b9\u6cd5\u4e0d\u540c\uff0c\u90e8\u7f72\u9632\u706b\u5899\u89c4\u5219\u3002<\/p>\n

\u5199\u5728\u524d\u9762\uff1a<\/h3>\n

\u57fa\u4e8e OpenVZ \u865a\u62df\u5316\u6280\u672f\u7684 VPS \u9700\u8981\u5f00\u542fTUN\/TAP\u624d\u80fd\u6b63\u5e38\u4f7f\u7528\uff0c\u8d2d\u4e70 VPS \u65f6\u8bf7\u5148\u54a8\u8be2\u670d\u52a1\u5546\u662f\u5426\u652f\u6301\u5f00\u542f TUN\/TAP\u3002<\/p>\n

OpenVZ \u865a\u62df\u7684 VPS \u9700\u8981\u7cfb\u7edf\u5185\u6838\u652f\u6301 IPSec \u624d\u884c\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u6bcd\u670d\u52a1\u5668\u7684\u5185\u6838\u5982\u679c\u4e0d\u652f\u6301\u7684\u8bdd\u90a3\u5c31\u6ca1\u529e\u6cd5\uff0c\u53ea\u80fd\u6362 VPS\u3002
\n\u56e0\u6b64\uff0c\u4e00\u822c\u4e0d\u5efa\u8bae\u5728 OpenVZ \u7684 VPS \u4e0a\u5b89\u88c5\u672c\u811a\u672c\u3002\u811a\u672c\u5982\u679c\u68c0\u6d4b\u5230\u8be5 VPS \u4e3a OpenVZ \u67b6\u6784\uff0c\u4f1a\u51fa\u73b0\u8b66\u544a\u63d0\u9192\u3002<\/p>\n

\u5982\u4f55\u68c0\u6d4b\u662f\u5426\u652f\u6301TUN\u6a21\u5757\uff1f
\n\u6267\u884c\u547d\u4ee4\uff1a
\ncat \/dev\/net\/tun
\n\u5982\u679c\u8fd4\u56de\u4fe1\u606f\u4e3a\uff1acat: \/dev\/net\/tun: File descriptor in bad state \u8bf4\u660e\u6b63\u5e38<\/p>\n

\u5982\u4f55\u68c0\u6d4b\u662f\u5426\u652f\u6301ppp\u6a21\u5757\uff1f
\n\u6267\u884c\u547d\u4ee4\uff1a
\ncat \/dev\/ppp
\n\u5982\u679c\u8fd4\u56de\u4fe1\u606f\u4e3a\uff1acat: \/dev\/ppp: No such device or address \u8bf4\u660e\u6b63\u5e38
\n\u5f53\u7136\uff0c\u811a\u672c\u5728\u5b89\u88c5\u65f6\u4e5f\u4f1a\u6267\u884c\u68c0\u67e5\uff0c\u5982\u679c\u4e0d\u9002\u7528\u4e8e\u5b89\u88c5\uff0c\u811a\u672c\u4f1a\u4e88\u4ee5\u63d0\u793a\u3002<\/p>\n

\u4f7f\u7528\u65b9\u6cd5\uff1a<\/h3>\n

root \u7528\u6237\u767b\u5f55\u540e\uff0c\u8fd0\u884c\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n

wget --no-check-certificate https:\/\/raw.githubusercontent.com\/teddysun\/across\/master\/l2tp.sh\nchmod +x l2tp.sh\n.\/l2tp.sh<\/pre>\n
\u6267\u884c\u540e\uff0c\u4f1a\u6709\u5982\u4e0b\u4ea4\u4e92\u754c\u9762<\/p>\n
\"L2TP\"<\/a><\/p>\n
Please input IP-Range:
\n(Default Range: 192.168.18):
\n\u8f93\u5165\u672c\u5730IP\u6bb5\u8303\u56f4\uff08\u672c\u5730\u7535\u8111\u8fde\u63a5\u5230VPS\u540e\u7ed9\u5206\u914d\u7684\u4e00\u4e2a\u672c\u5730IP\u5730\u5740\uff09\uff0c\u76f4\u63a5\u56de\u8f66\u610f\u5473\u7740\u8f93\u5165\u9ed8\u8ba4\u503c192.168.18<\/p>\n
Please input PSK:
\n(Default PSK: teddysun.com):
\nPSK\u610f\u4e3a\u9884\u5171\u4eab\u5bc6\u94a5\uff0c\u5373\u6307\u5b9a\u4e00\u4e2a\u5bc6\u94a5\u5c06\u6765\u5728\u8fde\u63a5\u65f6\u9700\u8981\u7528\u5230\uff0c\u76f4\u63a5\u56de\u8f66\u610f\u5473\u7740\u8f93\u5165\u9ed8\u8ba4\u503cteddysun.com<\/p>\n
Please input Username:
\n(Default Username: teddysun):
\nUsername\u610f\u4e3a\u7528\u6237\u540d\uff0c\u5373\u7b2c\u4e00\u4e2a\u9ed8\u8ba4\u7528\u6237\u3002\u76f4\u63a5\u56de\u8f66\u610f\u5473\u7740\u8f93\u5165\u9ed8\u8ba4\u503cteddysun<\/p>\n
Please input teddysun\u2019s password:
\n(Default Password: Q4SKhu2EXQ):
\n\u8f93\u5165\u7528\u6237\u7684\u5bc6\u7801\uff0c\u9ed8\u8ba4\u4f1a\u968f\u673a\u751f\u6210\u4e00\u4e2a10\u4f4d\u5305\u542b\u5927\u5c0f\u5199\u5b57\u6bcd\u548c\u6570\u5b57\u7684\u5bc6\u7801\uff0c\u5f53\u7136\u4f60\u4e5f\u53ef\u4ee5\u6307\u5b9a\u5bc6\u7801\u3002<\/p>\n
ServerIP:your_server_main_IP
\n\u663e\u793a\u4f60\u7684 VPS \u7684\u4e3b IP\uff08\u5982\u679c\u662f\u591a IP \u7684 VPS \u4e5f\u53ea\u663e\u793a\u4e00\u4e2a\uff09<\/p>\n
Server Local IP:192.168.18.1
\n\u663e\u793a\u4f60\u7684 VPS \u7684\u672c\u5730 IP\uff08\u9ed8\u8ba4\u5373\u53ef\uff09<\/p>\n
Client Remote IP Range:192.168.18.2-192.168.18.254
\n\u663e\u793a IP \u6bb5\u8303\u56f4<\/p>\n
PSK:teddysun.com
\n\u663e\u793a PSK<\/p>\n
Press any key to start\u2026or Press Ctrl+c to cancel
\n\u6309\u4e0b\u4efb\u610f\u6309\u952e\u7ee7\u7eed\uff0c\u5982\u679c\u60f3\u53d6\u6d88\u5b89\u88c5\uff0c\u8bf7\u6309Ctrl+c\u952e<\/p>\n
\u5b89\u88c5\u5b8c\u6210\u540e\uff0c\u811a\u672c\u4f1a\u6267\u884c ipsec verify \u547d\u4ee4\u5e76\u63d0\u793a\u5982\u4e0b\uff1a<\/p>\n
If there are no [FAILED] above, then you can connect to your\nL2TP VPN Server with the default Username\/Password is below:\n\nServerIP:your_server_IP\nPSK:your PSK\nUsername:your usename\nPassword:your password\n\nIf you want to modify user settings, please use command(s):\nl2tp -a (Add a user)\nl2tp -d (Delete a user)\nl2tp -l (List all users)\nl2tp -m (Modify a user password)\nWelcome to visit https:\/\/teddysun.com\/448.html\nEnjoy it!<\/pre>\n
\u5982\u679c\u4f60\u8981\u60f3\u5bf9\u7528\u6237\u8fdb\u884c\u64cd\u4f5c\uff0c\u53ef\u4ee5\u4f7f\u7528\u5982\u4e0b\u547d\u4ee4\uff1a
\nl2tp -a \u65b0\u589e\u7528\u6237
\nl2tp -d \u5220\u9664\u7528\u6237
\nl2tp -m \u4fee\u6539\u73b0\u6709\u7684\u7528\u6237\u7684\u5bc6\u7801
\nl2tp -l \u5217\u51fa\u6240\u6709\u7528\u6237\u540d\u548c\u5bc6\u7801
\nl2tp -h \u5217\u51fa\u5e2e\u52a9\u4fe1\u606f<\/p>\n
\u5176\u4ed6\u4e8b\u9879\uff1a<\/h3>\n
1\u3001\u811a\u672c\u5728\u5b89\u88c5\u5b8c\u6210\u540e\uff0c\u5df2\u81ea\u52a8\u542f\u52a8\u8fdb\u7a0b\uff0c\u5e76\u52a0\u5165\u4e86\u5f00\u673a\u81ea\u542f\u52a8\u3002
\n2\u3001\u811a\u672c\u4f1a\u6539\u5199 iptables \u6216 firewalld \u7684\u89c4\u5219\u3002
\n3\u3001\u811a\u672c\u5b89\u88c5\u65f6\uff0c\u4f1a\u5373\u65f6\u5c06\u5b89\u88c5\u65e5\u5fd7\u5199\u5230 \/root\/l2tp.log \u6587\u4ef6\u91cc\uff0c\u5982\u679c\u4f60\u5b89\u88c5\u5931\u8d25\uff0c\u53ef\u4ee5\u901a\u8fc7\u6b64\u6587\u4ef6\u6765\u5bfb\u627e\u9519\u8bef\u4fe1\u606f\u3002<\/p>\n
\u4f7f\u7528\u547d\u4ee4\uff1a<\/h3>\n
ipsec status \uff08\u67e5\u770b IPSec \u8fd0\u884c\u72b6\u6001\uff09
\nipsec verify \uff08\u67e5\u770b IPSec \u68c0\u67e5\u7ed3\u679c\uff09
\n\/etc\/init.d\/ipsec start|stop|restart|status \uff08CentOS6 \u4e0b\u4f7f\u7528\uff09
\n\/etc\/init.d\/xl2tpd start|stop|restart \uff08CentOS6 \u4e0b\u4f7f\u7528\uff09
\nsystemctl start|stop|restart|status ipsec \uff08CentOS7 \u4e0b\u4f7f\u7528\uff09
\nsystemctl start|stop|restart xl2tpd \uff08CentOS7 \u4e0b\u4f7f\u7528\uff09
\nservice ipsec start|stop|restart|status \uff08Debian\/Ubuntu \u4e0b\u4f7f\u7528\uff09
\nservice xl2tpd start|stop|restart \uff08Debian\/Ubuntu \u4e0b\u4f7f\u7528\uff09<\/p>\n
\u8bc4\u8bba\u8282\u9009\uff08\u6709\u6539\u52a8\uff09\uff0c\u4ec5\u4f9b\u53c2\u8003<\/h3>\n
\u8282\u90091\uff08\u611f\u8c22@wawnnzxd \u8bc4\u8bba\u4e8e 2016-11-10\uff09<\/p>\n
\u5b89\u53536.0\u7cfb\u7edf\u65e0\u6cd5\u6210\u529f\u8fde\u63a5l2tp\uff0c\u67e5\u4e86\u8c37\u6b4c\u4e4b\u540e\u53d1\u73b0\u597d\u50cf\u662f\u5b89\u5353\u662fsha256\u52a0\u5bc6
\n\u6211\u662f\u8fd9\u4e48\u505a\u7684\uff0c\u76ee\u524d\u6b63\u5e38\u8fde\u63a5\u4e00\u5c0f\u65f6\uff0c\u6ca1\u6709\u65ad\u7ebf\uff0cmac ios android
\n\u9700\u8981\u5728 \/etc\/ipsec.conf \u7684 conn L2TP-PSK-noNAT \u4e0b\u52a0\u5165<\/p>\n
sha2-truncbug=yes<\/pre>\n
\u7136\u540e\u91cd\u542f IPSec \u548c xl2tpd \u670d\u52a1\uff0c\u91cd\u65b0\u8fde\u63a5\u5c31\u53ef\u4ee5\u4e86\u3002
\n\u53ef\u4ee5\u89e3\u51b3\u5b89\u5353 6.0 \u7684 vpn \u65e0\u6cd5\u8fde\u63a5\u95ee\u9898\u3002<\/p>\n
\u8282\u90092\uff08\u611f\u8c22@S_ven \u8bc4\u8bba\u4e8e 2016-10-17\uff09<\/p>\n
\u5728\/etc\/ipsec.conf \u7684 conn L2TP-PSK-noNAT \u4e0b\u52a0\u5165<\/p>\n
leftnexthop defaultroute\nrightnexthop defaultroute<\/pre>\n
\u7136\u540e\u91cd\u542f IPSec \u548c xl2tpd \u670d\u52a1\u5e94\u8be5\u53ef\u4ee5\u89e3\u51b3\u540c\u4e00\u5c40\u57df\u4e0b\u591a\u4eba\u8fde\u63a5\u7684\u65f6\u5019\uff0c\u51fa\u73b0\u8fde\u63a5\u4e0d\u4e0a\u7684\u60c5\u51b5\u3002
\n\u5982\u679c\u8fd8\u662f\u4e0d\u884c\uff0c\u5c31\u5f97\u770b\u4e0b\u8fd9\u4e2a\u94fe\u63a5\u91cc\u9762\u7684\u914d\u7f6e\uff1a
\nhttps:\/\/segmentfault.com\/a\/1190000005626927<\/a>
\n\u6211\u5c31\u662f\u6839\u636e\u8fd9\u4e2a\u91cc\u9762\u7684\u914d\u7f6e\u548c\u4f60\u7684\u5bf9\u6bd4\u6539\u597d\u4e86\u3002<\/p>\n
\u66f4\u65b0\u65e5\u5fd7<\/h3>\n
2017 \u5e74 02 \u6708 25 \u65e5\uff1a
\n\u5347\u7ea7 libreswan \u5230\u7248\u672c 3.19\u3002
\n2016 \u5e74 09 \u6708 12 \u65e5\uff1a
\n\u4fee\u6b63\u4e86\u5728 CentOS 6 \u4e0b libevent2 \u4f9d\u8d56\u7684\u95ee\u9898\uff1b
\n\u65b0\u589e\u4e86\u4e00\u4e2a -m \u9009\u9879\uff0c\u7528\u4ee5\u4fee\u6539\u73b0\u6709\u7528\u6237\u7684\u5bc6\u7801\u3002
\n2016 \u5e74 08 \u6708 13 \u65e5\uff1a
\n\u4fee\u6b63 Debian 8 \u4e0b\u7684 sd-daemon.h: No such file or directory \u95ee\u9898\uff0c\u662f\u7531\u4e8e\u7f3a\u5c11\u4f9d\u8d56\u5305 libsystemd-daemon-dev \u5bfc\u81f4\u7684\u3002
\n2016 \u5e74 08 \u6708 05 \u65e5\uff1a
\n\u5347\u7ea7 libreswan \u5230\u7248\u672c 3.18\u3002
\n2016 \u5e74 06 \u6708 10 \u65e5\uff1a
\n\u811a\u672c\u5728\u5b89\u88c5\u5b8c\u6210\u540e\uff0c\u65b0\u589e\u4e86\u51e0\u4e2a\u547d\u4ee4\uff0c\u4fbf\u4e8e\u64cd\u4f5c\u7528\u6237
\nl2tp -a \u65b0\u589e\u7528\u6237
\nl2tp -d \u5220\u9664\u7528\u6237
\nl2tp -l \u5217\u51fa\u6240\u6709\u7528\u6237
\nl2tp -h \u5217\u51fa\u5e2e\u52a9\u4fe1\u606f
\n2016 \u5e74 04 \u6708 25 \u65e5\uff1a
\n4\u3001\u5728 Vultr \u7684 Debian 7 <\/strong>\u7684\u7cfb\u7edf\u6a21\u677f\u4e0b\u5b89\u88c5\u65f6\uff0c\u8f6f\u4ef6\u5305 libcurl4-nss-dev \u4f1a\u51fa\u73b0\u4f9d\u8d56\u9519\u8bef\u3002\u5982\u4e0b\u6240\u793a\uff1a
\nThe following packages have unmet dependencies:
\nlibcurl4-nss-dev : Depends: libldap2-dev but it is not going to be installed
\nDepends: librtmp-dev but it is not going to be installed<\/p>\n
\u800c libldap2-dev \u548c librtmp-dev \u53c8\u4f9d\u8d56\u4e86\u5176\u4ed6\u51e0\u79cd\u8f6f\u4ef6\u5305\u3002\u603b\u4e4b\u6700\u540e\u7684\u4f9d\u8d56\u5173\u7cfb\u5982\u4e0b\uff1a
\nlibldap2-dev : Depends: libldap-2.4-2 (= 2.4.31-2+deb7u1) but 2.4.31+really2.4.40+dfsg-1+deb8u1~bpo70+1 is to be installed
\nlibrtmp-dev : Depends: libgnutls-dev but it is not going to be installed
\nlibgnutls-dev : Depends: libp11-kit-dev (>= 0.4) but it is not going to be installed
\nlibp11-kit-dev : Depends: libp11-kit0 (= 0.12-3) but 0.20.7-1~bpo70+1 is to be installed<\/p>\n
\u90a3\u4e48\u89e3\u51b3\u529e\u6cd5\u5c31\u662f\u628a\u6700\u5e95\u5c42\u7684\u4f9d\u8d56\u5305 libp11-kit0 \u5148\u5378\u8f7d\u6389\uff0c\u7136\u540e\u518d\u5b89\u88c5 libcurl4-nss-dev \u5373\u53ef\u3002<\/p>\n
apt-get -y remove libp11-kit0\napt-get -y --no-install-recommends install libcurl4-nss-dev wget<\/pre>\n
\u7136\u540e\u518d\u8fd0\u884c\u811a\u672c\u5b89\u88c5\u5373\u53ef\u3002
\n2016 \u5e74 04 \u6708 22 \u65e5\uff1a
\n\u4fee\u590d\u4e86\u5728 Ubuntu 16.04 \u4e0b\u56e0\u4e3a\u9ed8\u8ba4\u7f3a\u5c11 python \u547d\u4ee4\u800c\u5bfc\u81f4 ipsec verify \u7b49\u547d\u4ee4\u4e0d\u80fd\u7528\u7684\u95ee\u9898\u3002
\n2016 \u5e74 04 \u6708 19 \u65e5\uff1a
\n\u4fee\u590d\u4e86\u5728 Debian 7 \u4e0b\u56e0\u4e3a libnss3 \u548c libnspr4 \u7684\u7248\u672c\u8fc7\u4f4e\u800c\u5bfc\u81f4\u7f16\u8bd1 libreswan \u5931\u8d25\u7684\u95ee\u9898\u3002
\n2016 \u5e74 04 \u6708 18 \u65e5\uff1a
\n\u76ee\u524d\u5728 Debian 7 \u4e0a\u6d4b\u8bd5\u7684\u7ed3\u679c\uff0c\u56e0\u4e3a libnss3 \u548c libnspr4 \u7684\u7248\u672c\u8fc7\u4f4e\u800c\u5bfc\u81f4\u7f16\u8bd1 libreswan \u5931\u8d25\u3002\u4e34\u65f6\u89e3\u51b3\u529e\u6cd5\u662f dpkg \u5b89\u88c5 libnss3_3.17.2 \u548c libnspr4_4.10.7 \u7684 deb \u5305\u540e\u91cd\u8bd5\u3002
\n\u53c2\u8003\u94fe\u63a5\uff1ahttps:\/\/libreswan.org\/wiki\/3.14_on_Debian_Wheezy<\/a><\/p>\n<\/article>\n
l2tp.sh \u6e90\u7801<\/span><\/h1>\n
#!\/usr\/bin\/env bash\nPATH=\/bin:\/sbin:\/usr\/bin:\/usr\/sbin:\/usr\/local\/bin:\/usr\/local\/sbin:~\/bin\nexport PATH\n#=======================================================================#\n#   System Supported:  CentOS 6+ \/ Debian 7+ \/ Ubuntu 12+               #\n#   Description: L2TP VPN Auto Installer                                #\n#   Author: Teddysun <i@teddysun.com>                                   #\n#   Intro:  https:\/\/teddysun.com\/448.html                               #\n#=======================================================================#\ncur_dir=`pwd`\n\nlibevent2_src_filename=\"libevent-2.0.22-stable\"\nlibreswan_filename=\"libreswan-3.19\"\n\nrootness(){\n    if [[ $EUID -ne 0 ]]; then\n       echo \"Error:This script must be run as root!\" 1>&2\n       exit 1\n    fi\n}\n\ntunavailable(){\n    if [[ ! -e \/dev\/net\/tun ]]; then\n        echo \"Error:TUN\/TAP is not available!\" 1>&2\n        exit 1\n    fi\n}\n\ndisable_selinux(){\nif [ -s \/etc\/selinux\/config ] && grep 'SELINUX=enforcing' \/etc\/selinux\/config; then\n    sed -i 's\/SELINUX=enforcing\/SELINUX=disabled\/g' \/etc\/selinux\/config\n    setenforce 0\nfi\n}\n\nget_opsy(){\n    [ -f \/etc\/redhat-release ] && awk '{print ($1,$3~\/^[0-9]\/?$3:$4)}' \/etc\/redhat-release && return\n    [ -f \/etc\/os-release ] && awk -F'[= \"]' '\/PRETTY_NAME\/{print $3,$4,$5}' \/etc\/os-release && return\n    [ -f \/etc\/lsb-release ] && awk -F'[=\"]+' '\/DESCRIPTION\/{print $2}' \/etc\/lsb-release && return\n}\n\nget_os_info(){\n    IP=$( ip addr | egrep -o '[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}' | egrep -v \"^192\\.168|^172\\.1[6-9]\\.|^172\\.2[0-9]\\.|^172\\.3[0-2]\\.|^10\\.|^127\\.|^255\\.|^0\\.\" | head -n 1 )\n    [ -z ${IP} ] && IP=$( wget -qO- -t1 -T2 ipv4.icanhazip.com )\n    local cname=$( awk -F: '\/model name\/ {name=$2} END {print name}' \/proc\/cpuinfo | sed 's\/^[ \\t]*\/\/;s\/[ \\t]*$\/\/' )\n    local cores=$( awk -F: '\/model name\/ {core++} END {print core}' \/proc\/cpuinfo )\n    local freq=$( awk -F: '\/cpu MHz\/ {freq=$2} END {print freq}' \/proc\/cpuinfo | sed 's\/^[ \\t]*\/\/;s\/[ \\t]*$\/\/' )\n    local tram=$( free -m | awk '\/Mem\/ {print $2}' )\n    local swap=$( free -m | awk '\/Swap\/ {print $2}' )\n    local up=$( awk '{a=$1\/86400;b=($1%86400)\/3600;c=($1%3600)\/60;d=$1%60} {printf(\"%ddays, %d:%d:%d\\n\",a,b,c,d)}' \/proc\/uptime )\n    local load=$( w | head -1 | awk -F'load average:' '{print $2}' | sed 's\/^[ \\t]*\/\/;s\/[ \\t]*$\/\/' )\n    local opsy=$( get_opsy )\n    local arch=$( uname -m )\n    local lbit=$( getconf LONG_BIT )\n    local host=$( hostname )\n    local kern=$( uname -r )\n\n    echo \"########## System Information ##########\"\n    echo \n    echo \"CPU model            : ${cname}\"\n    echo \"Number of cores      : ${cores}\"\n    echo \"CPU frequency        : ${freq} MHz\"\n    echo \"Total amount of ram  : ${tram} MB\"\n    echo \"Total amount of swap : ${swap} MB\"\n    echo \"System uptime        : ${up}\"\n    echo \"Load average         : ${load}\"\n    echo \"OS                   : ${opsy}\"\n    echo \"Arch                 : ${arch} (${lbit} Bit)\"\n    echo \"Kernel               : ${kern}\"\n    echo \"Hostname             : ${host}\"\n    echo \"IPv4 address         : ${IP}\"\n    echo \n    echo \"########################################\"\n}\n\ncheck_sys(){\n    local checkType=$1\n    local value=$2\n\n    local release=''\n    local systemPackage=''\n\n    if [[ -f \/etc\/redhat-release ]];then\n        release=\"centos\"\n        systemPackage=\"yum\"\n    elif cat \/etc\/issue | grep -q -E -i \"debian\";then\n        release=\"debian\"\n        systemPackage=\"apt\"\n    elif cat \/etc\/issue | grep -q -E -i \"ubuntu\";then\n        release=\"ubuntu\"\n        systemPackage=\"apt\"\n    elif cat \/etc\/issue | grep -q -E -i \"centos|red hat|redhat\";then\n        release=\"centos\"\n        systemPackage=\"yum\"\n    elif cat \/proc\/version | grep -q -E -i \"debian\";then\n        release=\"debian\"\n        systemPackage=\"apt\"\n    elif cat \/proc\/version | grep -q -E -i \"ubuntu\";then\n        release=\"ubuntu\"\n        systemPackage=\"apt\"\n    elif cat \/proc\/version | grep -q -E -i \"centos|red hat|redhat\";then\n        release=\"centos\"\n        systemPackage=\"yum\"\n    fi\n\n    if [[ ${checkType} == \"sysRelease\" ]]; then\n        if [ \"$value\" == \"$release\" ];then\n            return 0\n        else\n            return 1\n        fi\n    elif [[ ${checkType} == \"packageManager\" ]]; then\n        if [ \"$value\" == \"$systemPackage\" ];then\n            return 0\n        else\n            return 1\n        fi\n    fi\n}\n\nrand(){\n    index=0\n    str=\"\"\n    for i in {a..z}; do arr[index]=${i}; index=`expr ${index} + 1`; done\n    for i in {A..Z}; do arr[index]=${i}; index=`expr ${index} + 1`; done\n    for i in {0..9}; do arr[index]=${i}; index=`expr ${index} + 1`; done\n    for i in {1..10}; do str=\"$str${arr[$RANDOM%$index]}\"; done\n    echo ${str}\n}\n\nis_64bit(){\n    if [ `getconf WORD_BIT` = '32' ] && [ `getconf LONG_BIT` = '64' ] ; then\n        return 0\n    else\n        return 1\n    fi\n}\n\ndownload_file(){\n    local download_root_url=\"http:\/\/dl.teddysun.com\/files\"\n\n    if [ -s ${1} ]; then\n        echo \"$1 [found]\"\n    else\n        echo \"$1 not found!!!download now...\"\n        if ! wget -c -t3 -T60 ${download_root_url}\/${1};then\n            echo \"Failed to download $1, please download it to ${cur_dir} directory manually and try again.\"\n            exit 1\n        fi\n    fi\n}\n\nversionget(){\n    if [[ -s \/etc\/redhat-release ]];then\n        grep -oE  \"[0-9.]+\" \/etc\/redhat-release\n    else\n        grep -oE  \"[0-9.]+\" \/etc\/issue\n    fi\n}\n\ncentosversion(){\n    if check_sys sysRelease centos;then\n        local code=${1}\n        local version=\"`versionget`\"\n        local main_ver=${version%%.*}\n        if [ \"${main_ver}\" == \"${code}\" ];then\n            return 0\n        else\n            return 1\n        fi\n    else\n        return 1\n    fi\n}\n\ndebianversion(){\n    if check_sys sysRelease debian;then\n        local version=$( get_opsy )\n        local code=${1}\n        local main_ver=$( echo ${version} | sed 's\/[^0-9]\/\/g')\n        if [ \"${main_ver}\" == \"${code}\" ];then\n            return 0\n        else\n            return 1\n        fi\n    else\n        return 1\n    fi\n}\n\nversion_check(){\n    if check_sys packageManager yum; then\n        if centosversion 5; then\n            echo \"Error: CentOS 5 is not supported, Please re-install OS and try again.\"\n            exit 1\n        fi\n    fi\n}\n\nget_char(){\n    SAVEDSTTY=`stty -g`\n    stty -echo\n    stty cbreak\n    dd if=\/dev\/tty bs=1 count=1 2> \/dev\/null\n    stty -raw\n    stty echo\n    stty $SAVEDSTTY\n}\n\npreinstall_l2tp(){\n\n    echo\n    if [ -d \"\/proc\/vz\" ]; then\n        echo -e \"\\033[41;37m WARNING: \\033[0m Your VPS is based on OpenVZ, and IPSec might not be supported by the kernel.\"\n        echo \"Continue installation? (y\/n)\"\n        read -p \"(Default: n)\" agree\n        [ -z ${agree} ] && agree=\"n\"\n        if [ \"${agree}\" == \"n\" ]; then\n            echo\n            echo \"L2TP installation cancelled.\"\n            echo\n            exit 0\n        fi\n    fi\n    echo\n    echo \"Please enter IP-Range:\"\n    read -p \"(Default Range: 192.168.18):\" iprange\n    [ -z ${iprange} ] && iprange=\"192.168.18\"\n\n    echo \"Please enter PSK:\"\n    read -p \"(Default PSK: teddysun.com):\" mypsk\n    [ -z ${mypsk} ] && mypsk=\"teddysun.com\"\n\n    echo \"Please enter Username:\"\n    read -p \"(Default Username: teddysun):\" username\n    [ -z ${username} ] && username=\"teddysun\"\n\n    password=`rand`\n    echo \"Please enter ${username}'s password:\"\n    read -p \"(Default Password: ${password}):\" tmppassword\n    [ ! -z ${tmppassword} ] && password=${tmppassword}\n\n    echo\n    echo \"ServerIP:${IP}\"\n    echo \"Server Local IP:${iprange}.1\"\n    echo \"Client Remote IP Range:${iprange}.2-${iprange}.254\"\n    echo \"PSK:${mypsk}\"\n    echo\n    echo \"Press any key to start... or press Ctrl + C to cancel.\"\n    char=`get_char`\n\n}\n\ninstall_l2tp(){\n\n    mknod \/dev\/random c 1 9\n\n    if check_sys packageManager apt;then\n        apt-get -y update\n\n        if debianversion 7;then\n            if is_64bit;then\n                local libnspr4_filename1=\"libnspr4_4.10.7-1_amd64.deb\"\n                local libnspr4_filename2=\"libnspr4-0d_4.10.7-1_amd64.deb\"\n                local libnspr4_filename3=\"libnspr4-dev_4.10.7-1_amd64.deb\"\n                local libnspr4_filename4=\"libnspr4-dbg_4.10.7-1_amd64.deb\"\n                local libnss3_filename1=\"libnss3_3.17.2-1.1_amd64.deb\"\n                local libnss3_filename2=\"libnss3-1d_3.17.2-1.1_amd64.deb\"\n                local libnss3_filename3=\"libnss3-tools_3.17.2-1.1_amd64.deb\"\n                local libnss3_filename4=\"libnss3-dev_3.17.2-1.1_amd64.deb\"\n                local libnss3_filename5=\"libnss3-dbg_3.17.2-1.1_amd64.deb\"\n            else\n                local libnspr4_filename1=\"libnspr4_4.10.7-1_i386.deb\"\n                local libnspr4_filename2=\"libnspr4-0d_4.10.7-1_i386.deb\"\n                local libnspr4_filename3=\"libnspr4-dev_4.10.7-1_i386.deb\"\n                local libnspr4_filename4=\"libnspr4-dbg_4.10.7-1_i386.deb\"\n                local libnss3_filename1=\"libnss3_3.17.2-1.1_i386.deb\"\n                local libnss3_filename2=\"libnss3-1d_3.17.2-1.1_i386.deb\"\n                local libnss3_filename3=\"libnss3-tools_3.17.2-1.1_i386.deb\"\n                local libnss3_filename4=\"libnss3-dev_3.17.2-1.1_i386.deb\"\n                local libnss3_filename5=\"libnss3-dbg_3.17.2-1.1_i386.deb\"\n            fi\n            rm -rf ${cur_dir}\/l2tp\n            mkdir -p ${cur_dir}\/l2tp\n            cd ${cur_dir}\/l2tp\n            download_file \"${libnspr4_filename1}\"\n            download_file \"${libnspr4_filename2}\"\n            download_file \"${libnspr4_filename3}\"\n            download_file \"${libnspr4_filename4}\"\n            download_file \"${libnss3_filename1}\"\n            download_file \"${libnss3_filename2}\"\n            download_file \"${libnss3_filename3}\"\n            download_file \"${libnss3_filename4}\"\n            download_file \"${libnss3_filename5}\"\n            dpkg -i ${libnspr4_filename1} ${libnspr4_filename2} ${libnspr4_filename3} ${libnspr4_filename4}\n            dpkg -i ${libnss3_filename1} ${libnss3_filename2} ${libnss3_filename3} ${libnss3_filename4} ${libnss3_filename5}\n            apt-get -y install wget gcc ppp flex bison make pkg-config libpam0g-dev libcap-ng-dev libcap-ng-utils libunbound-dev libevent-dev libcurl4-nss-dev libsystemd-daemon-dev\n        else\n            apt-get -y install wget gcc ppp flex bison make python libnss3-dev libnspr4-dev pkg-config libpam0g-dev libcap-ng-dev libcap-ng-utils libunbound-dev libnss3-tools libevent-dev libcurl4-nss-dev libsystemd-daemon-dev\n        fi\n        apt-get -y --no-install-recommends install xmlto\n        apt-get -y install xl2tpd\n        compile_install\n    elif check_sys packageManager yum; then\n        if centosversion 7; then\n            yum -y install epel-release\n            yum -y install ppp libreswan xl2tpd firewalld\n            yum_install\n        elif centosversion 6; then\n            yum -y install epel-release\n            yum -y install gcc gcc-c++ ppp iptables make gmp-devel xmlto bison flex libpcap-devel lsof\n            yum -y install xl2tpd curl-devel nss-devel nspr-devel pkgconfig pam-devel unbound-devel libcap-ng-devel\n            compile_install\n        fi\n    fi\n\n}\n\ncompile_install(){\n\n    rm -rf ${cur_dir}\/l2tp\n    mkdir -p ${cur_dir}\/l2tp\n    cd ${cur_dir}\/l2tp\n    download_file \"${libreswan_filename}.tar.gz\"\n    tar -zxf ${libreswan_filename}.tar.gz\n\n    if centosversion 6; then\n        download_file \"${libevent2_src_filename}.tar.gz\"\n        tar -zxf ${libevent2_src_filename}.tar.gz\n        cd ${libevent2_src_filename}\n        .\/configure\n        make && make install\n        if [ $? -eq 0 ]; then\n            if is_64bit;then\n                ln -sf \/usr\/local\/lib\/libevent-2.0.so.5 \/usr\/lib64\/libevent-2.0.so.5\n                ln -sf \/usr\/local\/lib\/libevent_pthreads-2.0.so.5 \/usr\/lib64\/libevent_pthreads-2.0.so.5\n            else\n                ln -sf \/usr\/local\/lib\/libevent-2.0.so.5 \/usr\/lib\/libevent-2.0.so.5\n                ln -sf \/usr\/local\/lib\/libevent_pthreads-2.0.so.5 \/usr\/lib\/libevent_pthreads-2.0.so.5\n            fi\n            echo \"\/usr\/local\/lib\" > \/etc\/ld.so.conf.d\/local.conf\n            ldconfig\n        else\n            echo \"libevent2 install failed...\"\n            exit 1\n        fi\n    fi\n\n    cd ${cur_dir}\/l2tp\/${libreswan_filename}\n    echo \"WERROR_CFLAGS =\" > Makefile.inc.local\n    make programs && make install\n\n    \/usr\/local\/sbin\/ipsec --version >\/dev\/null 2>&1\n    if [ $? -ne 0 ];then\n        echo \"${libreswan_filename} install failed.\"\n        exit 1\n    fi\n\n    cat > \/etc\/ipsec.conf<<EOF\nconfig setup\n    nat_traversal=yes\n    protostack=netkey\n    oe=off\n    interfaces=\"%defaultroute\"\n    dumpdir=\/var\/run\/pluto\/\n    virtual_private=%v4:10.0.0.0\/8,%v4:192.168.0.0\/16,%v4:172.16.0.0\/12,%v4:25.0.0.0\/8,%v4:100.64.0.0\/10,%v6:fd00::\/8,%v6:fe80::\/10\n\nconn L2TP-PSK-NAT\n    rightsubnet=vhost:%priv\n    also=L2TP-PSK-noNAT\n\nconn L2TP-PSK-noNAT\n    authby=secret\n    pfs=no\n    auto=add\n    keyingtries=3\n    rekey=no\n    ikelifetime=8h\n    keylife=1h\n    type=transport\n    left=${IP}\n    leftid=${IP}\n    leftprotoport=17\/1701\n    right=%any\n    rightprotoport=17\/%any\n    dpddelay=40\n    dpdtimeout=130\n    dpdaction=clear\nEOF\n\n    cat > \/etc\/ipsec.secrets<<EOF\n${IP} %any: PSK \"${mypsk}\"\nEOF\n\n    cat > \/etc\/xl2tpd\/xl2tpd.conf<<EOF\n[global]\nlisten-addr = ${IP}\n[lns default]\nip range = ${iprange}.2-${iprange}.254\nlocal ip = ${iprange}.1\nrequire chap = yes\nrefuse pap = yes\nrequire authentication = yes\nname = LinuxVPNserver\nppp debug = yes\npppoptfile = \/etc\/ppp\/options.xl2tpd\nlength bit = yes\nEOF\n\n    cat > \/etc\/ppp\/options.xl2tpd<<EOF\nipcp-accept-local\nipcp-accept-remote\nrequire-mschap-v2\nms-dns 8.8.8.8\nms-dns 8.8.4.4\nnoccp\nauth\ncrtscts\nhide-password\nidle 1800\nmtu 1410\nmru 1410\nnodefaultroute\nname l2tpd\ndebug\nlock\nproxyarp\nconnect-delay 5000\nEOF\n\n    rm -f \/etc\/ppp\/chap-secrets\n    cat > \/etc\/ppp\/chap-secrets<<EOF\n# Secrets for authentication using CHAP\n# client    server    secret    IP addresses\n${username}    l2tpd    ${password}       *\nEOF\n\n    cp -pf \/etc\/sysctl.conf \/etc\/sysctl.conf.bak\n\n    sed -i 's\/net.ipv4.ip_forward = 0\/net.ipv4.ip_forward = 1\/g' \/etc\/sysctl.conf\n\n    for each in `ls \/proc\/sys\/net\/ipv4\/conf\/`\n    do\n        echo \"net.ipv4.conf.${each}.accept_source_route=0\" >> \/etc\/sysctl.conf\n        echo \"net.ipv4.conf.${each}.accept_redirects=0\" >> \/etc\/sysctl.conf\n        echo \"net.ipv4.conf.${each}.send_redirects=0\" >> \/etc\/sysctl.conf\n        echo \"net.ipv4.conf.${each}.rp_filter=0\" >> \/etc\/sysctl.conf\n    done\n    sysctl -p\n\n    if centosversion 6; then\n        [ -f \/etc\/sysconfig\/iptables ] && cp -pf \/etc\/sysconfig\/iptables \/etc\/sysconfig\/iptables.old.`date +%Y%m%d`\n\n        if [ \"`\/sbin\/iptables-save | grep -c '^\\-'`\" = \"0\" ]; then\n            cat > \/etc\/sysconfig\/iptables <<EOF\n# Added by L2TP VPN script\n*filter\n:INPUT ACCEPT [0:0]\n:FORWARD ACCEPT [0:0]\n:OUTPUT ACCEPT [0:0]\n-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT\n-A INPUT -p icmp -j ACCEPT\n-A INPUT -i lo -j ACCEPT\n-A INPUT -p tcp --dport 22 -j ACCEPT\n-A INPUT -p udp -m multiport --dports 500,4500,1701 -j ACCEPT\n-A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT\n-A FORWARD -s ${iprange}.0\/24  -j ACCEPT\nCOMMIT\n*nat\n:PREROUTING ACCEPT [0:0]\n:OUTPUT ACCEPT [0:0]\n:POSTROUTING ACCEPT [0:0]\n-A POSTROUTING -s ${iprange}.0\/24 -j SNAT --to-source ${IP}\nCOMMIT\nEOF\n        else\n            iptables -I INPUT -p udp -m multiport --dports 500,4500,1701 -j ACCEPT\n            iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT\n            iptables -I FORWARD -s ${iprange}.0\/24  -j ACCEPT\n            iptables -t nat -A POSTROUTING -s ${iprange}.0\/24 -j SNAT --to-source ${IP}\n            \/etc\/init.d\/iptables save\n        fi\n\n        if [ ! -f \/etc\/ipsec.d\/cert9.db ]; then\n           echo > \/var\/tmp\/libreswan-nss-pwd\n           certutil -N -f \/var\/tmp\/libreswan-nss-pwd -d \/etc\/ipsec.d\n           rm -f \/var\/tmp\/libreswan-nss-pwd\n        fi\n\n        chkconfig --add iptables\n        chkconfig iptables on\n        chkconfig --add ipsec\n        chkconfig ipsec on\n        chkconfig --add xl2tpd\n        chkconfig xl2tpd on\n\n        \/etc\/init.d\/iptables restart\n        \/etc\/init.d\/ipsec start\n        \/etc\/init.d\/xl2tpd start\n\n    else\n        [ -f \/etc\/iptables.rules ] && cp -pf \/etc\/iptables.rules \/etc\/iptables.rules.old.`date +%Y%m%d`\n\n        if [ \"`\/sbin\/iptables-save | grep -c '^\\-'`\" = \"0\" ]; then\n            cat > \/etc\/iptables.rules <<EOF\n# Added by L2TP VPN script\n*filter\n:INPUT ACCEPT [0:0]\n:FORWARD ACCEPT [0:0]\n:OUTPUT ACCEPT [0:0]\n-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT\n-A INPUT -p icmp -j ACCEPT\n-A INPUT -i lo -j ACCEPT\n-A INPUT -p tcp --dport 22 -j ACCEPT\n-A INPUT -p udp -m multiport --dports 500,4500,1701 -j ACCEPT\n-A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT\n-A FORWARD -s ${iprange}.0\/24  -j ACCEPT\nCOMMIT\n*nat\n:PREROUTING ACCEPT [0:0]\n:OUTPUT ACCEPT [0:0]\n:POSTROUTING ACCEPT [0:0]\n-A POSTROUTING -s ${iprange}.0\/24 -j SNAT --to-source ${IP}\nCOMMIT\nEOF\n        else\n            iptables -I INPUT -p udp -m multiport --dports 500,4500,1701 -j ACCEPT\n            iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT\n            iptables -I FORWARD -s ${iprange}.0\/24  -j ACCEPT\n            iptables -t nat -A POSTROUTING -s ${iprange}.0\/24 -j SNAT --to-source ${IP}\n            \/sbin\/iptables-save > \/etc\/iptables.rules\n        fi\n\n        cat > \/etc\/network\/if-up.d\/iptables <<EOF\n#!\/bin\/sh\n\/sbin\/iptables-restore < \/etc\/iptables.rules\nEOF\n        chmod +x \/etc\/network\/if-up.d\/iptables\n\n        if [ ! -f \/etc\/ipsec.d\/cert9.db ]; then\n           echo > \/var\/tmp\/libreswan-nss-pwd\n           certutil -N -f \/var\/tmp\/libreswan-nss-pwd -d \/etc\/ipsec.d\n           rm -f \/var\/tmp\/libreswan-nss-pwd\n        fi\n\n        update-rc.d -f xl2tpd defaults\n\n        cp -f \/etc\/rc.local \/etc\/rc.local.old.`date +%Y%m%d`\n        sed --follow-symlinks -i -e '\/^exit 0\/d' \/etc\/rc.local\n        cat >> \/etc\/rc.local <<EOF\n\n# Added by L2TP VPN script\necho 1 > \/proc\/sys\/net\/ipv4\/ip_forward\n\/usr\/sbin\/service ipsec start\nexit 0\nEOF\n        chmod +x \/etc\/rc.local\n        echo 1 > \/proc\/sys\/net\/ipv4\/ip_forward\n\n        \/sbin\/iptables-restore < \/etc\/iptables.rules\n        \/usr\/sbin\/service ipsec start\n        \/usr\/sbin\/service xl2tpd restart\n\n    fi\n\n}\n\nyum_install(){\n\n    rm -f \/etc\/ipsec.conf\n    cat > \/etc\/ipsec.conf<<EOF\nconfig setup\n    nat_traversal=yes\n    protostack=netkey\n    oe=off\n    interfaces=\"%defaultroute\"\n    dumpdir=\/var\/run\/pluto\/\n    virtual_private=%v4:10.0.0.0\/8,%v4:192.168.0.0\/16,%v4:172.16.0.0\/12,%v4:25.0.0.0\/8,%v4:100.64.0.0\/10,%v6:fd00::\/8,%v6:fe80::\/10\n\nconn L2TP-PSK-NAT\n    rightsubnet=vhost:%priv\n    also=L2TP-PSK-noNAT\n\nconn L2TP-PSK-noNAT\n    authby=secret\n    pfs=no\n    auto=add\n    keyingtries=3\n    rekey=no\n    ikelifetime=8h\n    keylife=1h\n    type=transport\n    left=${IP}\n    leftid=${IP}\n    leftprotoport=17\/1701\n    right=%any\n    rightprotoport=17\/%any\n    dpddelay=40\n    dpdtimeout=130\n    dpdaction=clear\nEOF\n    rm -f \/etc\/ipsec.secrets\n    cat > \/etc\/ipsec.secrets<<EOF\n${IP} %any: PSK \"${mypsk}\"\nEOF\n    rm -f \/etc\/xl2tpd\/xl2tpd.conf\n    cat > \/etc\/xl2tpd\/xl2tpd.conf<<EOF\n[global]\nlisten-addr = ${IP}\n[lns default]\nip range = ${iprange}.2-${iprange}.254\nlocal ip = ${iprange}.1\nrequire chap = yes\nrefuse pap = yes\nrequire authentication = yes\nname = LinuxVPNserver\nppp debug = yes\npppoptfile = \/etc\/ppp\/options.xl2tpd\nlength bit = yes\nEOF\n    rm -f \/etc\/ppp\/options.xl2tpd\n    cat > \/etc\/ppp\/options.xl2tpd<<EOF\nipcp-accept-local\nipcp-accept-remote\nrequire-mschap-v2\nms-dns 8.8.8.8\nms-dns 8.8.4.4\nnoccp\nauth\ncrtscts\nhide-password\nidle 1800\nmtu 1410\nmru 1410\nnodefaultroute\nname l2tpd\ndebug\nlock\nproxyarp\nconnect-delay 5000\nEOF\n    rm -f \/etc\/ppp\/chap-secrets\n    cat > \/etc\/ppp\/chap-secrets<<EOF\n# Secrets for authentication using CHAP\n# client    server    secret    IP addresses\n${username}    l2tpd    ${password}       *\nEOF\n\n    cp -pf \/etc\/sysctl.conf \/etc\/sysctl.conf.bak\n\n    echo \"# Added by L2TP VPN\" >> \/etc\/sysctl.conf\n    echo \"net.ipv4.ip_forward=1\" >> \/etc\/sysctl.conf\n    echo \"net.ipv4.tcp_syncookies=1\" >> \/etc\/sysctl.conf\n    echo \"net.ipv4.icmp_echo_ignore_broadcasts=1\" >> \/etc\/sysctl.conf\n    echo \"net.ipv4.icmp_ignore_bogus_error_responses=1\" >> \/etc\/sysctl.conf\n\n    for each in `ls \/proc\/sys\/net\/ipv4\/conf\/`\n    do\n        echo \"net.ipv4.conf.${each}.accept_source_route=0\" >> \/etc\/sysctl.conf\n        echo \"net.ipv4.conf.${each}.accept_redirects=0\" >> \/etc\/sysctl.conf\n        echo \"net.ipv4.conf.${each}.send_redirects=0\" >> \/etc\/sysctl.conf\n        echo \"net.ipv4.conf.${each}.rp_filter=0\" >> \/etc\/sysctl.conf\n    done\n    sysctl -p\n\n    cat > \/usr\/lib\/firewalld\/services\/xl2tpd.xml<<EOF\n<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<service>\n  <short>xl2tpd<\/short>\n  <description>L2TP IPSec<\/description>\n  <port protocol=\"udp\" port=\"4500\"\/>\n  <port protocol=\"udp\" port=\"1701\"\/>\n<\/service>\nEOF\n    chmod 640 \/usr\/lib\/firewalld\/services\/xl2tpd.xml\n\n    systemctl enable ipsec\n    systemctl enable xl2tpd\n    systemctl enable firewalld\n\n    systemctl status firewalld > \/dev\/null 2>&1\n    if [ $? -eq 0 ];then\n        echo \"Checking firewalld status...\"\n        firewall-cmd --list-all\n        echo \"add firewalld rules...\"\n        firewall-cmd --permanent --add-service=ipsec\n        firewall-cmd --permanent --add-service=xl2tpd\n        firewall-cmd --permanent --add-masquerade\n        firewall-cmd --reload\n    else\n        echo \"Firewalld looks like not running, trying to start...\"\n        systemctl start firewalld\n        if [ $? -eq 0 ];then\n            echo \"Firewalld start successfully...\"\n            echo \"Checking firewalld status...\"\n            firewall-cmd --list-all\n            echo \"adding firewalld rules...\"\n            firewall-cmd --permanent --add-service=ipsec\n            firewall-cmd --permanent --add-service=xl2tpd\n            firewall-cmd --permanent --add-masquerade\n            firewall-cmd --reload\n        else\n            echo \"Failed to start firewalld. please enable port 500 4500 manually if necessary.\"\n        fi\n    fi\n\n    systemctl restart ipsec\n    systemctl restart xl2tpd\n    echo \"Checking ipsec status...\"\n    systemctl -a | grep ipsec\n    echo \"Checking xl2tpd status...\"\n    systemctl -a | grep xl2tpd\n    echo \"Checking firewalld status...\"\n    firewall-cmd --list-all\n    firewall-cmd --list-all | grep xl2tpd > \/dev\/null 2>&1\n    if [ $? -ne 0 ];then\n        firewall-cmd --permanent --add-service=xl2tpd\n        firewall-cmd --reload\n    fi\n\n}\n\nfinally(){\n\n    cd ${cur_dir}\n    rm -fr ${cur_dir}\/l2tp\n    # create l2tp command\n    cp -f ${cur_dir}\/`basename $0` \/usr\/bin\/l2tp\n\n    echo \"Please wait a moment...\"\n    sleep 5\n    ipsec verify\n    echo\n    echo \"###############################################################\"\n    echo \"# L2TP VPN Auto Installer                                     #\"\n    echo \"# System Supported: CentOS 6+ \/ Debian 7+ \/ Ubuntu 12+        #\"\n    echo \"# Intro: https:\/\/teddysun.com\/448.html                        #\"\n    echo \"# Author: Teddysun <i@teddysun.com>                           #\"\n    echo \"###############################################################\"\n    echo \"If there is no [FAILED] above, you can connect to your L2TP \"\n    echo \"VPN Server with the default Username\/Password is below:\"\n    echo\n    echo \"ServerIP:${IP}\"\n    echo \"PSK:${mypsk}\"\n    echo \"Username:${username}\"\n    echo \"Password:${password}\"\n    echo\n    echo \"If you want to modify user settings, please use command(s):\"\n    echo \"l2tp -a (Add a user)\"\n    echo \"l2tp -d (Delete a user)\"\n    echo \"l2tp -l (List all users)\"\n    echo \"l2tp -m (Modify a user password)\"\n    echo\n    echo \"Welcome to visit https:\/\/teddysun.com\/448.html\"\n    echo \"Enjoy it!\"\n    echo\n}\n\n\nl2tp(){\n    clear\n    echo\n    echo \"###############################################################\"\n    echo \"# L2TP VPN Auto Installer                                     #\"\n    echo \"# System Supported: CentOS 6+ \/ Debian 7+ \/ Ubuntu 12+        #\"\n    echo \"# Intro: https:\/\/teddysun.com\/448.html                        #\"\n    echo \"# Author: Teddysun <i@teddysun.com>                           #\"\n    echo \"###############################################################\"\n    echo\n    rootness\n    tunavailable\n    disable_selinux\n    version_check\n    get_os_info\n    preinstall_l2tp\n    install_l2tp\n    finally\n}\n\nlist_users(){\n    if [ ! -f \/etc\/ppp\/chap-secrets ];then\n        echo \"Error: \/etc\/ppp\/chap-secrets file not found.\"\n        exit 1\n    fi\n    local line=\"+-------------------------------------------+\\n\"\n    local string=%20s\n    printf \"${line}|${string} |${string} |\\n${line}\" Username Password\n    grep -v \"^#\" \/etc\/ppp\/chap-secrets | awk '{printf \"|'${string}' |'${string}' |\\n\", $1,$3}'\n    printf ${line}\n}\n\nadd_user(){\n    while :\n    do\n        read -p \"Please input your Username:\" user\n        if [ -z ${user} ]; then\n            echo \"Username can not be empty\"\n        else\n            grep -w \"${user}\" \/etc\/ppp\/chap-secrets > \/dev\/null 2>&1\n            if [ $? -eq 0 ];then\n                echo \"Username (${user}) already exists. Please re-enter your username.\"\n            else\n                break\n            fi\n        fi\n    done\n    pass=`rand`\n    echo \"Please input ${user}'s password:\"\n    read -p \"(Default Password: ${pass}):\" tmppass\n    [ ! -z ${tmppass} ] && pass=${tmppass}\n    echo \"${user}    l2tpd    ${pass}       *\" >> \/etc\/ppp\/chap-secrets\n    echo \"Username (${user}) add completed.\"\n}\n\ndel_user(){\n    while :\n    do\n        read -p \"Please input Username you want to delete it:\" user\n        if [ -z ${user} ]; then\n            echo \"Username can not be empty\"\n        else\n            grep -w \"${user}\" \/etc\/ppp\/chap-secrets >\/dev\/null 2>&1\n            if [ $? -eq 0 ];then\n                break\n            else\n                echo \"Username (${user}) is not exists. Please re-enter your username.\"\n            fi\n        fi\n    done\n    sed -i \"\/^\\<${user}\\>\/d\" \/etc\/ppp\/chap-secrets\n    echo \"Username (${user}) delete completed.\"\n}\n\nmod_user(){\n    while :\n    do\n        read -p \"Please input Username you want to change password:\" user\n        if [ -z ${user} ]; then\n            echo \"Username can not be empty\"\n        else\n            grep -w \"${user}\" \/etc\/ppp\/chap-secrets >\/dev\/null 2>&1\n            if [ $? -eq 0 ];then\n                break\n            else\n                echo \"Username (${user}) is not exists. Please re-enter your username.\"\n            fi\n        fi\n    done\n    pass=`rand`\n    echo \"Please input ${user}'s new password:\"\n    read -p \"(Default Password: ${pass}):\" tmppass\n    [ ! -z ${tmppass} ] && pass=${tmppass}\n    sed -i \"\/^\\<${user}\\>\/d\" \/etc\/ppp\/chap-secrets\n    echo \"${user}    l2tpd    ${pass}       *\" >> \/etc\/ppp\/chap-secrets\n    echo \"Username ${user}'s password has been changed.\"\n}\n\n# Main process\naction=$1\nif [ -z ${action} ] && [ \"`basename $0`\" != \"l2tp\" ]; then\n    action=install\nfi\n\ncase ${action} in\n    install)\n        l2tp 2>&1 | tee \/root\/l2tp.log\n        ;;\n    -l|--list)\n        list_users\n        ;;\n    -a|--add)\n        add_user\n        ;;\n    -d|--del)\n        del_user\n        ;;\n    -m|--mod)\n        mod_user\n        ;;\n    -h|--help)\n        echo \"Usage: `basename $0` -l,--list   List all users\"\n        echo \"       `basename $0` -a,--add    Add a user\"\n        echo \"       `basename $0` -d,--del    Delete a user\"\n        echo \"       `basename $0` -m,--mod    Modify a user password\"\n        echo \"       `basename $0` -h,--help   Print this help information\"\n        ;;\n    *)\n        echo \"Usage: `basename $0` [-l,--list|-a,--add|-d,--del|-m,--mod|-h,--help]\" && exit\n        ;;\nesac<\/pre>\n","protected":false},"excerpt":{"rendered":"
\t\t\t\t\t\t… <\/p>\n
\u9605\u8bfb\u66f4\u591a<\/i><\/a><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-12","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"http:\/\/www.zhangyijun.com\/index.php?rest_route=\/wp\/v2\/posts\/12","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.zhangyijun.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.zhangyijun.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.zhangyijun.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.zhangyijun.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=12"}],"version-history":[{"count":0,"href":"http:\/\/www.zhangyijun.com\/index.php?rest_route=\/wp\/v2\/posts\/12\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.zhangyijun.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=12"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.zhangyijun.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=12"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.zhangyijun.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}