[Kamailio-Users] sip_resolvehost: NATPR query timed out

Hello Im getting this error in my Kamailio-1.5.2: Sep 16 15:43:08 sip kamailio[25298]: ERROR:core:sip_resolvehost: NATPR query timed out, no server could be reached, stop resolving (Connection timed out) Sep 16 15:43:08 sip kamailio[25298]: CRITICAL:core:mk_proxy: could not resolve hostname: "sip.server.pt" Sep 16 15:43:08 sip kamailio[25298]: ERROR:tm:uri2proxy: bad host name in URI <sip:sip.server.pt> Sep 16 15:43:08 sip kamailio[25298]: ERROR:tm:t_forward_nonack: failure to add branches Why cant Kamailio resolve the name? Could this be causing my clients SIP registrations to fail? Thanks regards Joao Pereira