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
' Y& J+ F7 L$ H) u) G

1. net.ipv4.ip_forward = 1
   
2. net.ipv4.conf.default.rp_filter = 0
   
3. net.ipv4.conf.all.rp_filter = 0
   ' C7 l  W) f( M- j
4. net.ipv4.conf.all.send_redirects = 0
   " Q# C8 }( x$ p: _- e! P
5. net.ipv4.conf.default.send_redirects = 0
   6 D5 T; c& ]6 _9 K" [  F4 d2 z7 ^
6. net.ipv4.conf.all.accept_redirects = 0
   " _0 H! }. u6 s" p/ L* K8 v4 k
7. net.ipv4.conf.default.accept_redirects = 0
   9 d! J$ g2 T4 c  Z1 p% n
8. net.core.xfrm_larval_drop = 1

复制代码

, q( x# Y3 g& h; t6 I  T; C2.防火墙添加规则

1. iptables -t nat -A POSTROUTING ! -s 127.0.0.1/8 -j MASQUERADE
   
2. iptables -I FORWARD -p tcp -m tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu

复制代码