Hi Pierre, The error may indicate that port 53 on 127.0.0.1 is already used by another service. This appears to be confirmed by your netstat example. This is probably a dns service. Hope this helps explain the error. Joe
-------- Original message -------- From: Pierre Emeriaud <petrus.lt+open...@gmail.com> Date: Wed, 28 Oct 2020, 10:36 am To: misc <misc@openbsd.org> Subject: wg(4) listen on a specific interface / address Howdy misc@, I have a fairly complicated setup with lots of interfaces, a couple of rdomains etc. I'd like wireguard to listen only on an IP address, not all. But if my understanding of ifconfig(8) is correct, this doesn't seem possible currently: wgport port Set the UDP port that the tunnel operates on. _The interface will bind to INADDR_ANY and IN6ADDR_ANY_INIT._ I guess this the reason for the following behaviour? $ doas ifconfig wg0 wgport 53 ifconfig: SIOCSWG: Address already in use (the error message is generic I guess - but confusing imho) $ netstat -natfinet | grep 53 tcp 0 0 127.0.0.1.53 *.* LISTEN udp 0 0 127.0.0.1.53 *.* $ netstat -T1 -natfinet | grep 53 udp 0 0 127.0.0.1.53 *.* Is there a way to circumvent this restriction? (is there a reason behind it maybe?) thanks -- pierre
