Hello community,
I work with Kamailio
4.2.0 which is placed between two networks (with two
interfaces) and RTPproxy in bridge mode.
The task from
Kamailio is to handle the calls from internal networks to
internal networks only on the internal Interface without
bridging. For external networks vice versa. If the call
comes from external to internal, then the RTPproxy should
work in bridge mode and vice versa. I adapt the example with
IPv4 and IPv6 routing, but this is not working for internal
to external calls and vice versa (http://kb.asipto.com/kamailio:kamailio-mixed-ipv4-ipv6).
Only external calls and only internal calls works. I think
the cause of this behavior is the routing which I
implemented to the RTPmanage part in the Kamailio config.
The error message is
given by the internal device. (call from external to
internal)
If I make a call from
internal to external, the RTP stream is only in one
direction.
Internal Interface
IP: 203.207.111.58
External Interface
IP: 193.16.163.58
The RTPproxy config
is:
CONTROL_SOCK=udp:127.0.0.1:9000
EXTRA_OPTS="-l
203.207.111.58/193.16.163.58 -d WARN:LOG_LOCAL1"
Kamailio.cfg:
#!define
INT_IP 10.96.0.0/14
#!define
EXT_IP 193.0.0.0/8
# RTPProxy control
and singaling updates for NAT traversal
route[NATMANAGE] {
#!ifdef WITH_NAT
if
(is_request()) {
if(has_totag()) {
if(check_route_param("nat=yes")) {
setbflag(FLB_NATB);
}
}
}
if
(!(isflagset(FLT_NATS) || isbflagset(FLB_NATB)))
return;
#
rtpproxy_manage("co");
# Start Test routing
if((src_ip==INT_IP && dst_ip==EXT_IP)){
rtpproxy_manage("cowie");
}
if((src_ip==EXT_IP && dst_ip==INT_IP)){
rtpproxy_manage("cowei");
}
if
(is_request()) {
if
(!has_totag()) {
if(t_is_branch_route()) {
add_rr_param(";nat=yes");
}
}
}
if
(is_reply()) {
if(isbflagset(FLB_NATB)) {
if(is_first_hop())
set_contact_alias();
}
}
#!endif
return;
}
Can someone help me with
the right routing? Do you need some more debugging
information?
Cheers,
Kai