vps搭建l2tp vpn

参考链接:

  1. http://blog.csdn.net/sonsie007/article/details/16932017
  2. http://www.wangyuxiong.com/archives/52330
  3. http://freenuts.com/how-to-set-up-a-l2tpipsec-vpn-in-a-vps/
  4. http://askubuntu.com/questions/337036/openswans-ipsec-verify-fails-on-two-or-more-interfaces-found-checking-ip-forw
  5. http://serverfault.com/questions/619115/ipsec-verify-on-ubuntu-two-or-more-interfaces-found-checking-ip-forwarding-fai
  6. http://www.scar1et.org/l2tp-for-centos
  7. http://blog.csdn.net/hah1995/article/details/46254279