当我使用命令连接到 VPN 网络时，sudo openvpn my.ovpn浏览互联网变得无法实现，我将其缩小到 openvpn 制作的错误路由表。 - 但仍然感觉更像是一个猜测...... :/
$ sudo route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 wlp2s0
0.0.0.0 192.168.1.1 0.0.0.0 UG 600 0 0 wlp2s0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 wlp2s0
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
172.18.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-f7335b6325f0
172.19.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-6c1adab37f3b
172.20.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-70ef8a9aefd2
172.21.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-62071bf2c0d4
172.22.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-c9fa9a847bb0
172.23.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-ce123fa76772
192.168.1.0 0.0.0.0 255.255.255.0 U 600 0 0 wlp2s0
连接到 VPN 后，我的路由表如下所示
$ sudo route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 172.16.0.129 0.0.0.0 UG 0 0 0 tun0
0.0.0.0 192.168.1.1 0.0.0.0 UG 600 0 0 wlp2s0
10.0.0.0 172.16.0.129 255.255.0.0 UG 0 0 0 tun0
10.101.0.0 172.16.0.129 255.255.0.0 UG 0 0 0 tun0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 wlp2s0
172.16.0.128 0.0.0.0 255.255.255.128 U 0 0 0 tun0
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
172.18.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-f7335b6325f0
172.19.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-6c1adab37f3b
172.20.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-70ef8a9aefd2
172.21.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-62071bf2c0d4
172.22.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-c9fa9a847bb0
172.23.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-ce123fa76772
192.168.1.0 0.0.0.0 255.255.255.0 U 600 0 0 wlp2s0
6.6.6.6 192.168.1.1 255.255.255.255 UGH 0 0 0 wlp2s0
6.6.6.6 - 假 IP 地址。我连接的 VPN 服务器的 IP 地址被更改了
未连接到 VPN 服务器时的 traceroute：
$ traceroute 8.8.8.8
traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets
1 livebox.home (192.168.1.1) 6.014 ms 7.916 ms 12.544 ms
2 war-bng5.tpnet.pl (80.50.18.82) 71.976 ms 74.233 ms 76.108 ms
3 war-r1.tpnet.pl (80.50.18.81) 53.427 ms 46.392 ms 50.110 ms
4 ae106-10.ffttr6.frankfurt.opentransit.net (193.251.249.7) 78.465 ms 80.336 ms 84.105 ms
5 72.14.214.52 (72.14.214.52) 86.035 ms 87.803 ms 90.152 ms
6 * * 108.170.251.193 (108.170.251.193) 64.282 ms
7 108.170.233.39 (108.170.233.39) 64.289 ms 108.170.228.133 (108.170.228.133) 66.307 ms 108.170.238.245 (108.170.238.245) 66.721 ms
8 google-public-dns-a.google.com (8.8.8.8) 70.173 ms 43.889 ms 41.797 ms
连接到 VPN 时进行路由跟踪
$ traceroute 8.8.8.8
traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets
1 * * *
(...) all the way to 30
30 * * *