Hello,

Using this event route  (see doc)

event_route[topoh:msg-outgoing] {

if($sndto(ip)=="10.1.1.10") {

    drop;

  }

}

Cause

Feb 20 21:02:22 proxy2 /usr/sbin/kamailio[16417]: ERROR: <core> [core/parser/parse_via.c:2051]: parse_via(): bad char <´> on state 100

Feb 20 21:02:22 proxy2 /usr/sbin/kamailio[16417]: ERROR: <core> [core/parser/parse_via.c:2704]: parse_via(): parsing via on: <´#037#027#015#012X>

Feb 20 21:02:22 proxy2 /usr/sbin/kamailio[16417]: ERROR: <core> [core/parser/parse_via.c:2710]: parse_via(): via parse error

Feb 20 21:02:22 proxy2 /usr/sbin/kamailio[16417]: ERROR: topoh [th_msg.c:454]: th_unmask_via(): cannot find cookie in via2

Feb 20 21:02:22 proxy2 /usr/sbin/kamailio[16416]: ERROR: <core> [core/parser/parse_via.c:2051]: parse_via(): bad char <´> on state 100

Feb 20 21:02:22 proxy2 /usr/sbin/kamailio[16416]: ERROR: <core> [core/parser/parse_via.c:2704]: parse_via(): parsing via on: <´#037#027#015#012X>

Feb 20 21:02:22 proxy2 /usr/sbin/kamailio[16416]: ERROR: <core> [core/parser/parse_via.c:2710]: parse_via(): via parse error

Feb 20 21:02:22 proxy2 /usr/sbin/kamailio[16416]: ERROR: topoh [th_msg.c:454]: th_unmask_via(): cannot find cookie in via2

Kamailio 5.1.7