[Serdev] [Tracker] Updated: (SER-200) Patch for a new nathelper nat_uac_test (Contact != rport)

[Jan Janak (JIRA)]

     [ http://tracker.iptel.org/browse/SER-200?page=all ]

Jan Janak updated SER-200:
--------------------------

    Fix Version/s: Wishlist

> Patch for a new nathelper nat_uac_test (Contact != rport)
> ---------------------------------------------------------
>
>                 Key: SER-200
>                 URL: http://tracker.iptel.org/browse/SER-200
>             Project: SER
>          Issue Type: Improvement
>          Components: NAT Traversal
>    Affects Versions: Ipteldorf
>         Environment: Latest CVS code (Ottendorf version) from the 18.12.2006.
>            Reporter: Nils Ohlmeier
>            Priority: Minor
>             Fix For: Wishlist
>
>         Attachments: nathelper_contact_rport_test.patch
>
>
> The attached patch adds one more test to the nat_uac_test (0x20) which compares the port in the Contact header with the port value from the transport layer (UDP/TCP). This test can be helpful in scenarios with clients behind symmetric NATs and STUN support, where the wrong Contact header port may be the only indication for a NAT traversal, but not fixing these values breaks the further in-dialog communication. But be warned that this test should not be used by default, as it might break things for example in cases where UA's are on a public IP and advertising a different port in their Contact header with intention.

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