I have Kamailio 5.6 on Debian 11. I need to use the function forward within a routing block in my configuration file: forward("udp:192.168.28.51:5060"); But when I start the kamailio service I got: CRITICAL: <core> [core/proxy.c:264]: mk_proxy(): could not resolve hostname: "udp:192.168.28.51:5060" The same occurs when I use the dns nane : forward("udp:raspberry3.emtelco.co:5060"); Any ideas ? Regards -- Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/3467 You are receiving this because you are subscribed to this thread. Message ID: &lt;kamailio/kamailio/issues/3467(a)github.com&gt;