Hi
I use opensips 3.4 and I have NAT problems with 2 devices behind the same NAT
(called party hears nothing).
The A party is softphone on iPhone (linphone) the B (called)party is
Polycom310. The other way around works (Polycom calls linphone).
Actually I tested this in two different NAT locations.
The first location repeatedly works. The second location gives the problem.
Both locations have changing public IP addresses and DHCP on 192.168 network.
Both locations have one FX number assigned to them. No SIP ALG active.
I use nat_uac_test(diff-ip-src-contact).
There is a table:
1.5.5. nat_uac_test(flags)
Tries to guess if client's request originated behind a nat. The parameter
determines what heuristics is used.
Meaning of the flags (string) parameter is as follows:
private-contact - (old 1 flag) Contact header field is searched for occurrence
of RFC1918 / RFC6598 addresses.
diff-ip-src-via - (old 2 flag) the "received" test is used: address in Via is
compared against source IP address of signaling
private-via - (old 4 flag) Top Most VIA is searched for occurrence of RFC1918 /
RFC6598 addresses
private-sdp - (old 8 flag) SDP is searched for occurrence of RFC1918 / RFC6598
addresses
diff-port-src-via - (old 16 flag) test if the source port is different from the
port in Via
diff-ip-src-contact - (old 32 flag) address in Contact is compared against
source IP address of signaling. <<<<
diff-port-src-contact - (old 64 flag) Port in Contact is compared against
source port of signaling <<<<
carrier-grade-nat - (old 128 flag) also include RFC 6333 addresses in the
checks for ct, via and sdp flags.
A CSV of the above flags can be provided, the test returns true if any of the
tests identified a NAT.
Currently I use old flag 32.
I read that using the equivalent of 19 might help but I dont see that in the
table.
Any advice is appreciated.
Regards,
Ronald Geerligs
_______________________________________________
Users mailing list
Users@lists.opensips.org
http://lists.opensips.org/cgi-bin/mailman/listinfo/users
