B is Xlite and is behind NAT.
didn't try with public IP yet

yep. asterisk send only one.
bss kerp sending.
got many traces

I am using the BSS NAT capabilities but everything is located on the asterisk.
I am surprised I am the only one facing this issue.
Seems to be very simple layout I am using.

Will appreciate any suggestion.

Thanks

here is the print of the INVITE Request-Line: INVITE sip:6868456@62.x.x.x:5060;rinstance=b769be10c08da7ab SIP/2.0 Message Header Via: SIP/2.0/UDP 184.x.x.x:5060;rport;branch=z9hG4bK13110541c601a14383f799-a48da33f-4323a0d4 To: <sip:6868456@184.x.x.x:5060> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE ...

already tried it.
didn't help.
tried changing pretty much every configuration in the configuration page.
thought it might be my DP but I am using a simple one that is even shown in the documents.
it MUST be something very simple and obvious I am (sadly) missing.

A doesn't send any more INVITE
Asterisk doesn't either.
call-id remains the same as the asterisk is configured to work as proxy.
it's like the BSS doesn't recognized that the responses belong to the INVITE but if it didn't, why did it sends back the 180 and 200 to A?

forgot to mention the most strange thing.
the BSS sends back the 180 and the 200 correctly to the A party.
anyone encountered that behavior?

asterisk

1. Brekeke Product Name and version: 2.4.8.6 2. Java version: 1.6.0_18 3. OS type and the version: Linux debian 6 4. UA (phone), gateway or other hardware/software involved: PBX and xlite 5. Select your network pattern from http://www.brekeke-sip.com/bbs/network/networkpatterns.html : pattern 9 6 ...