20 Jul
2018
20 Jul
'18
4:13 a.m.
Hello,
I'm using Kamailio 4.2 as proxy with nathelper enabled.
Yet , the ACK packet sent from the proxy to the origination's private IP.
The ACK is sent as reply on the following 200 OK sent from the origination :
8m2EJN41BN/6WSIP/2.0 200 OK
From: <sip:+4444331234567@X.X.X.X;user=phone>;tag=XQBQNjvjgp4Ze
To: <sip:+905362695933@172.16.45.65;user=phone>;tag=12033368836000
Via: SIP/2.0/UDP
X.X.X.X:5065;branch=z9hG4bK2959.233ecbc5eff949f946d8763ce25e5e6d.0;received=
X.X.X.X,SIP/2.0/UDP
X.X.X.X;received=X.X.X.X;rport=5060;branch=z9hG4bKN93cXvv26vDDN
Record-Route: <sip:X.X.X.X:5065;lr;ftag=XQBQNjvjgp4Ze>
Call-ID: CbeX8453909200habfGhEfElPce(a)BC00.XXXXXXXXXXXXXX
CSeq: 125698370 INVITE
Accept: application/sdp
Allow: INVITE,ACK,OPTIONS,BYE,CANCEL,UPDATE
P-Charging-Vector:
icid-value=B0912C3D70-0720-09394507;icid-generated-at=BC00.XXXXXXXXXXXXXX.XX
;orig-ioi=MXXXXXXXXXXXXXX
Content-Type: application/sdp
Contact: <sip:172.16.45.65:5060;transport=UDP>
Content-Length: 268
v=0
o=- 5838243 5838244 IN IP4 BC00.XXXXXXXXXXXXXX
s=-
c=IN IP4 172.16.45.144
t=0 0
a=sendrecv
m=audio 47588 RTP/AVP 18 96
c=IN IP4 172.16.45.144
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=yes
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15
a=maxptime:20
Following is the header of the sent ACK packet:
Request-Line: ACK sip:172.16.45.65:5060;transport=UDP SIP/2.0
Record-Route: <sip:X.X.X.X:5065;lr;ftag=XQBQNjvjgp4Ze>
Via: SIP/2.0/UDP
X.X.X.X:5065;branch=z9hG4bK2959.871535fd341bbe3099d0bf60d6460e18.0
Via: SIP/2.0/UDP
X.X.X.X;received=X.X.X.X;rport=5060;branch=z9hG4bKQUpy0jy90etjc
Max-Forwards: 69
From: <sip:+4444331234567@X.X.X.X;user=phone>;tag=XQBQNjvjgp4Ze
To: <sip:+905362695933@172.16.45.65;user=phone>;tag=12033368836000
Call-ID: CbeX8453909200habfGhEfElPce(a)BC00.XXXXXXXXXXXXXX
CSeq: 125698370 ACK
Content-Length: 0
Where X.X.X.X is Kamailio server public IP.
Following is part of my config file :
route {
route(NATDETECT);
record_route();
if(!mf_process_maxfwd_header("10")) {
sl_send_reply("483", "Too Many Hops");
exit;
}
# Maybe some sanity_check() here.
if(has_totag()) {
if(loose_route()) {
route(DLGURI);
if(!t_relay())
sl_reply_error();
exit;
} else {
if(is_method("ACK")) {
route(DLGURI);
if(t_check_trans()) {
t_relay();
}
} else
sl_send_reply("403", "Forbidden");
}
exit;
}
.....
}
route[NATDETECT] {
#!ifdef WITH_NAT
force_rport();
if (nat_uac_test("19")) {
if (is_method("REGISTER")) {
fix_nated_register();
} else {
add_contact_alias();
}
setflag(FLT_NATS);
}
#!endif
return;
}
route[DLGURI] {
#!ifdef WITH_NAT
if(!isdsturiset()) {
handle_ruri_alias();
}
#!endif
return;
}
Can you please check why the ACK is still sent on private IP ?
Thanks
Ali Taher