[SR-Users] how i should process replies on nathelper pings?

[Andres Moya]

Hi.

nathelper sending empty OPTIONS messages to clients. It have only one 
VIA, server's IP address(195.167.152.55). Then it got reply i have:
U 195.167.152.55:5060 -> 81.195.165.250:5060
  OPTIONS sip:81.195.165.250:5060 SIP/2.0..Via: SIP/2.0/UDP 
195.167.152.55:5060;branch=0..From: sip:pinger at riki.ru;tag=e64c73d5..To: 
sip:81.195.165.250:5060..Call-ID: 680bed34-d2e5c741-0eff517 at 195.167.152
  .55..CSeq: 1 OPTIONS..Content-Length: 0....
#
U 81.195.165.250:5060 -> 195.167.152.55:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 
195.167.152.55:5060;branch=0..Contact: <sip:10.0.52.103:5060>..To: 
<sip:81.195.165.250:5060>;tag=021c6509..From: 
<sip:pinger at riki.ru>;tag=e64c73d5..Call-ID: 680bed34-d2e
  5c741-0eff517 at 195.167.152.55..CSeq: 1 OPTIONS..Accept: 
application/sdp, application/sdp..Accept-Language: en..Allow: INVITE, 
ACK, CANCEL, BYE, NOTIFY, REFER, MESSAGE, OPTIONS, INFO, 
SUBSCRIBE..User-Agen
  t: Zoiper rev.5324..Allow-Events: presence..Content-Length: 0....
Nov 25 23:59:26 v /usr/local/sbin/kamailio[9697]: ERROR: <core> 
[forward.c:695]: ERROR: forward_reply: no 2nd via found in reply
#
U 195.167.152.55:5070 -> 86.154.150.209:5060
  OPTIONS sip:86.154.150.209:5060 SIP/2.0..Via: SIP/2.0/UDP 
195.167.152.55:5070;branch=0..From: sip:pinger at riki.ru;tag=f64c73d5..To: 
sip:86.154.150.209:5060..Call-ID: 680bed34-e2e5c741-7eff517 at 195.167.152
  .55..CSeq: 1 OPTIONS..Content-Length: 0....
#
U 86.154.150.209:5060 -> 195.167.152.55:5070
  SIP/2.0 404 Not Found..Via: SIP/2.0/UDP 
195.167.152.55:5070;branch=0..To: 
<sip:86.154.150.209>;tag=931uruqh0thc6crbneub..From: 
<sip:pinger at riki.ru>;tag=f64c73d5..Call-ID: 680bed34-e2e5c741-7eff517 at 195.1
  67.152.55..CSeq: 1 OPTIONS..Content-Length: 0....
Nov 25 23:59:33 v /usr/local/sbin/kamailio[9698]: ERROR: <core> 
[forward.c:695]: ERROR: forward_reply: no 2nd via found in reply

Reply should be consumed by nathelper? or i should eat it somewhere?  i 
can't do so in request route. and i can't use reply route because i 
can't set t_on_reply, it is not my request. There should be easy way... 
tired get ERROR: forward_reply: no 2nd via found in reply

thanks