我正在使用 VPNC-client 连接到我的office-network。它运行良好。
我的机器是Ubuntu16.04。
但当我连接到时VPN，我无法访问公共互联网或google.com
是否配置（当 VPN 连接时）
br-1b5f9a5d3ef3 Link encap:Ethernet HWaddr 02:42:02:97:fc:19
inet addr:171.18.0.1 Bcast:0.0.0.0 Mask:255.255.0.0
inet6 addr: fe80::42:2ff:fe97:fc19/64 Scope:Link
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:1202 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:137378 (137.3 KB)
docker0 Link encap:Ethernet HWaddr 02:42:e6:dd:41:9c
inet addr:172.17.0.1 Bcast:0.0.0.0 Mask:255.255.0.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
enp3s0 Link encap:Ethernet HWaddr 3c:97:0e:52:9c:4b
inet addr:192.168.1.124 Bcast:192.168.1.124 Mask:255.255.255.255
inet6 addr: fe80::f45:59f7:5048:911c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:523084 errors:0 dropped:80 overruns:0 frame:0
TX packets:628988 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:212687829 (212.6 MB) TX bytes:247005317 (247.0 MB)
Interrupt:19
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:53197 errors:0 dropped:0 overruns:0 frame:0
TX packets:53197 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:5917170 (5.9 MB) TX bytes:5917170 (5.9 MB)
tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:11.129.222.84 P-t-P:10.129.222.84 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1412 Metric:1
RX packets:317 errors:0 dropped:0 overruns:0 frame:0
TX packets:1996 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:78204 (78.2 KB) TX bytes:532254 (532.2 KB)
wlp2s0 Link encap:Ethernet HWaddr 67:94:23:38:c2:f5
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:2 errors:0 dropped:0 overruns:0 frame:777078
TX packets:1 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:226 (226.0 B) TX bytes:143 (143.0 B)
Interrupt:17
路线（VPNC 连接前）
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default 192.168.1.1 0.0.0.0 UG 100 0 0 enp3s0
link-local * 255.255.0.0 U 1000 0 0 br-1b5f9a5d3ef3
182.17.0.0 * 255.255.0.0 U 0 0 0 docker0
182.18.0.0 * 255.255.0.0 U 0 0 0 br-1b5f9a5d3ef3
192.168.1.1 * 255.255.255.255 UH 100 0 0 enp3s0
192.168.1.124 * 255.255.255.255 UH 100 0 0 enp3s0
oo-234.officeweb 192.168.1.1 255.255.255.255 UGH 0 0 0 enp3s0
255.255.255.0 * 255.255.255.255 UH 100 0 0 enp3s0
路线（VPNC连接后）
kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default * 0.0.0.0 U 0 0 0 tun0
default 192.168.1.1 0.0.0.0 UG 100 0 0 enp3s0
10.129.222.84 * 255.255.255.255 UH 0 0 0 tun0
link-local * 255.255.0.0 U 1000 0 0 br-1b5f9a5d3ef3
182.17.0.0 * 255.255.0.0 U 0 0 0 docker0
182.18.0.0 * 255.255.0.0 U 0 0 0 br-1b5f9a5d3ef3
192.168.1.1 * 255.255.255.255 UH 100 0 0 enp3s0
192.168.1.124 * 255.255.255.255 UH 100 0 0 enp3s0
oo-234.officeweb 192.168.1.1 255.255.255.255 UGH 0 0 0 enp3s0
255.255.255.0 * 255.255.255.255 UH 100 0 0 enp3s0
编辑：1
路线（后route del default dev tun0）
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default 192.168.1.1 0.0.0.0 UG 100 0 0 enp3s0
default 192.168.43.1 0.0.0.0 UG 600 0 0 wlp2s0
11.12.222.107 * 255.255.255.255 UH 0 0 0 tun0
link-local * 255.255.0.0 U 1000 0 0 br-1b5f9a5d3ef3
171.17.0.0 * 255.255.0.0 U 0 0 0 docker0
172.18.0.0 * 255.255.0.0 U 0 0 0 br-1b5f9a5d3ef3
192.168.1.1 * 255.255.255.255 UH 100 0 0 enp3s0
192.168.1.124 * 255.255.255.255 UH 100 0 0 enp3s0
192.168.43.0 * 255.255.255.0 U 600 0 0 wlp2s0
oo-234.officeweb 192.168.1.1 255.255.255.255 UGH 0 0 0 enp3s0
255.255.255.0 * 255.255.255.255 UH 100 0 0 enp3s0
答案1
一些 VPN 禁用互联网访问（出于安全原因），但在您的情况下，VPN 似乎默认添加了一条可能导致此问题的路由：
default * 0.0.0.0 U 0 0 0 tun0
嘗試運行route del default dev tun0。
你的同事有同样的问题吗？...如果是出于安全原因，我宁愿建议为该 VPN 使用虚拟机。