[OpenSIPS-Devel] [opensips] NAT Via Test Failure (#401)

[jalung]

Based on the docs Global Settings, <b>dns</b> and <b>rev_dns</b> control whether the sip server should lookup its own IP and Domain name. In testing for RFC1918, it is also looking up the dns and rev_dns for the client's public IP. If rev_dns=no then the client can register.

Some Troubleshooting Data:

Sometimes server is timing out/failing on setting rev_dns=yes. Function does not return or continue on to any other NAT tests.
<code>
 IN core:ClientNatTest:test_source_address:received_test:check_ip_address.

 INFO:core:check_ip_address: N1 rfc1918=10.34.37.108
 INFO:core:check_ip_address: N2 public=xxx.xxx.xxx.xxx
 INFO:core:check_ip_address: dns lookup
 INFO:core:check_ip_address: rev. dns lookup
</code>

when rev_dns = no
<code>
 IN core:ClientNatTest:test_source_address:received_test:check_ip_address.

 INFO:core:check_ip_address: N1 rfc1918=10.34.37.108
 INFO:core:check_ip_address: N2 public=xxx.xxx.xxx.xxx
 INFO:core:check_ip_address: dns lookup
 INFO:core:check_ip_address: lastly
 INFO:nat_traversal:test_source_address: NAT different_ip=-1 via1_port=13923 different_port=1
 INFO:nat_traversal:ClientNatTest: NAT success= flag 2
</code>

Should client_nat_test() check for the clients dns and rev_dns?

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Reply to this email directly or view it on GitHub:
https://github.com/OpenSIPS/opensips/issues/401#issuecomment-72397119
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