<html><head></head><body><div class="ydpceb13acfyahoo-style-wrap" style="font-size: 13px;"><div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;">Hello,</div><div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;"><br></div><div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;">I have been trying for several days to setup a wireguard vpn and send all the traffic from a VM to another site (redirect gateway scenario).</div><div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;"><br></div><div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;">Site A</div><div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;">OS is Centos 7.6 installed with docker and wireguard installed</div><div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;"><br></div><div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;">Site B</div><div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;">OS is a Opensense 19.7.4 with wireguard installed from the plugin and a bunch of other things on it</div><div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;"><br></div><div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;">I believe the issue is within Ip route on Centos 7.6 but I am reaching out for maybe different opinions.</div><div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;">On the Centos VM I am using wireguard installed from the repos on the website and using systemd to bring up the tunnel. Everything seem to be brought up correctly except that the traffic does not go through the tunnel.</div><div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;"><br></div><div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;">Further investigating I noticed something unusual (in my opinion).</div><div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;"><br></div><div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;">Before the tunnel is up:</div><div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;"><div dir="ltr" data-setdir="false"><pre style="orphans: 2; widows: 2;">#ip rule show
0: from all lookup local
32766: from all lookup main
32767: from all lookup default </pre></div></div><div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;">After the tunnel is up:</div><div dir="ltr" data-setdir="false"><div dir="ltr" data-setdir="false"><pre style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif; orphans: 2; widows: 2;">#ip rule show
0: from all lookup local
32764: from all lookup main
32765: not from all fwmark 0xca6c lookup 51820
32766: from all lookup main
32767: from all lookup default </pre><pre style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif; orphans: 2; widows: 2;"><span><span style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;">To me is seems like somehow there are 2 tables named "main" one after the new table created by wg-quick (looking at the priority it seems it is the same one that was present previously) and another one that gets create out of thin air before the wireguard created one named 51820.</span></span></pre><pre style="orphans: 2; widows: 2;"><span style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;">Ping works through the tunnel for IP to the other end of the tunnel</span></pre><pre style="orphans: 2; widows: 2;"><div dir="ltr" data-setdir="false"><pre>#wg
interface: wg0
public key: 8JXLXfl1W2xZd1T+zaCKSNB+FhUbb1IquIHvHhY7/iY=
private key: (hidden)
listening port: 34559
fwmark: 0xca6c
peer: 04kTPSrh08X5uOCmL5aM1iCm8UqFHGtJDsrsPReafS8=
endpoint: 188.27.172.68:1300
allowed ips: 0.0.0.0/0
latest handshake: 1 minute, 41 seconds ago
transfer: 87.85 KiB received, 415.61 KiB sent
persistent keepalive: every 15 seconds</pre><pre><div dir="ltr" data-setdir="false"><pre># ping 192.168.249.1
PING 192.168.249.1 (192.168.249.1) 56(84) bytes of data.
64 bytes from 192.168.249.1: icmp_seq=1 ttl=64 time=89.2 ms
64 bytes from 192.168.249.1: icmp_seq=2 ttl=64 time=89.5 ms</pre></div></pre></div></pre></div></div><div dir="ltr" data-setdir="false" style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif;"><span><pre style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif; orphans: 2; widows: 2;">Is there any step that I might have missed or any kernel feature that would explain the behaviour?</pre><pre style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif; orphans: 2; widows: 2;">Worth mentioning it is a home env so I can test whatever is needed to get to the bottom of it.</pre><pre style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif; orphans: 2; widows: 2;"><br></pre><pre style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif; orphans: 2; widows: 2;">Thanks</pre><pre style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif; orphans: 2; widows: 2;"><br></pre><pre style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif; orphans: 2; widows: 2;">George</pre></span></div></div></body></html>