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<body>Hello,<div><br /></div><div>I have a setup in which the Server IP is known, whereas the Client IP is changing. Thus, I rely on the Client to connect to the Server. I want the Client to keep the connection alive all the time though, so that the Server can also initiate a connection to the Server when needed. Both, client and server are behind a NAT/Router.</div><div>I would think, that the "PersistentKeepalive = 25" on the Client would ckeep the connection open. The connection works fine while used. But after a while, I cannot connect from the Server to the client anymore.</div><div>I would assume that a ping from the Client to the IP of the endpoint would help to re-alive the connection - but it does not.</div><div><br /></div><div>Only after a wg-quick down and up all is fine again.</div><div><br /></div><div>Below some more information.</div><div><br /></div><div>Can you help me to find, what I am doing wrong?</div><div><br /></div><div>Regards,</div><div>Hendrik</div><div><br /></div><div><br /></div><div><br /></div><div>At the time of the problem "wg" shows on the Client:</div><div>interface: wgnet0<br /> public key: cebXSxxx=<br /> private key: (hidden)<br /> listening port: 60147<br /> fwmark: 0xca6c<br /><br />peer: oNjoixxx=<br /> endpoint: 92.210.7.177:51820<br /> allowed ips: 0.0.0.0/0<br /> latest handshake: 1 day, 7 hours, 44 minutes, 19 seconds ago<br /> transfer: 48.48 GiB received, 1.22 TiB sent<br /> persistent keepalive: every 25 seconds<br /></div><div><br /></div><div><br /></div><div>and on the Server</div><div> wg<br />interface: wgnet0<br /> public key: oNjoijXxxx=</div><div> private key: (hidden)<br /> listening port: 51820<br /><br />peer: cebXSxx=<br /> endpoint: 185.22.142.254:60147<br /> allowed ips: 10.192.122.3/32<br /> latest handshake: 1 day, 7 hours, 46 minutes, 5 seconds ago<br /> transfer: 67.24 MiB received, 651.37 MiB sent<br /><br />peer: ZiTlYnxx=<br /> endpoint: 109.41.65.27:5935<br /> allowed ips: 10.192.122.2/32<br /> latest handshake: 2 days, 21 hours, 49 minutes, 25 seconds ago<br /> transfer: 11.98 MiB received, 127.11 MiB sent<br /></div><div><br /></div><div><br /></div><div>Note the "transfer" being different between the two by far. I show the peer "ZiTIY" for completeness only. I do not think that it is relevant.</div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div>The Client config:</div><div>[Interface]</div><div>Address = 10.192.122.3/32</div><div>PrivateKey = xx=</div><div><br /></div><div>[Peer]</div><div>PublicKey = yy=</div><div>Endpoint = Dyn.IP:51820</div><div>AllowedIPs = 0.0.0.0/0</div><div>PersistentKeepalive = 25</div><div><br /></div><div>The Server config:</div><div>[Interface]</div><div>Address = 10.192.122.1/24</div><div>SaveConfig = true</div><div>PostUp = iptables -A FORWARD -i wgnet0 -j ACCEPT; iptables -A FORWARD -o wgnet0 -j ACCEPT; iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE</div><div>PostDown = iptables -D FORWARD -i wgnet0 -j ACCEPT; iptables -D FORWARD -o wgnet0 -j ACCEPT; iptables -t nat -D POSTROUTING -o eth0 -j MASQUERADE</div><div>ListenPort = 51820</div><div>PrivateKey = aa=</div><div><br /></div><div>[Peer]</div><div>PublicKey = bb=</div><div>AllowedIPs = 10.192.122.2/32</div><div>Endpoint = hidden:41646</div><div><br /></div><div>[Peer]</div><div>PublicKey = cc=</div><div>AllowedIPs = 10.192.122.3/32</div><div>Endpoint = hidden:60147</div><div><br /></div><div><br /></div><div><br /></div><div><br /></div><div><br /></div></body></html>