Hi, On 8/24/20 12:28 PM, Andreas Fink wrote: > the server might tell it that it can also connect on 127.0.0.1 because > of the advertized IPs maybe? > Yes sure, that's happening, the server is advertising the 127.0.0.1 over the conn established in ::1<->::1 because it is bound to that address too, but that's fine imho. The problem is the client attempting to connect to server's 127.0.0.1 despite being not bound to any IPv4 address, and specifically to 127.0.0.1. -- - Pau Espin Pedrol <pespin@xxxxxxxxxxx> http://www.sysmocom.de/ ======================================================================= * sysmocom - systems for mobile communications GmbH * Alt-Moabit 93 * 10559 Berlin, Germany * Sitz / Registered office: Berlin, HRB 134158 B * Geschaeftsfuehrer / Managing Director: Harald Welte