阿里云L2TP连接后无网络解决方法

admin

1.修改服务器内核参数，服务器配置文件/etc/sysctl.conf修改或者添加内容如下

1. net.ipv4.ip_forward = 1
   
2. net.ipv4.conf.default.rp_filter = 0
   9 U  v8 W# v5 D
3. net.ipv4.conf.all.rp_filter = 0
   , y( K2 r0 I5 Y3 Z. |( X* J
4. net.ipv4.conf.all.send_redirects = 0
   . _- G1 \! X7 n7 n
5. net.ipv4.conf.default.send_redirects = 0
   
6. net.ipv4.conf.all.accept_redirects = 0
   $ N, U5 Q1 G. q: ~: n- l3 E6 B7 l/ h
7. net.ipv4.conf.default.accept_redirects = 0
   6 }% u* B+ _, X8 R) H
8. net.core.xfrm_larval_drop = 1

复制代码

! \# B  ]5 q6 t9 E3 w2.防火墙添加规则
8 O6 z: \' p; r1 P  g9 g3 F) N

1. iptables -t nat -A POSTROUTING ! -s 127.0.0.1/8 -j MASQUERADE
   * i0 _3 J- y0 g9 o& H! R
2. iptables -I FORWARD -p tcp -m tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu

复制代码