On 17/08/16 20:26, Noah Mehl wrote: > I discussed this with Alex Balashov off-line, and he answered my > questions: > >> >> 1. A flag of 3, I don’t understand. I read the documentation >> >> <http://kamailio.org/docs/modules/4.4.x/modules/nathelper.html#nathelper.f.nat_uac_test>, >> and there is a 1,2,4,8,etc… So, I’m guessing that a flag of 3, >> means 1+2? >> > > Yes, apparently this is a bit > array: https://en.wikipedia.org/wiki/Bit_array and a value of 3 = 1+2. > >> 2. If #1 is true, then "the "received" test is used: address in >> the “Via” header is compared against source IP address of signaling” >> 1. I don’t understand this test, as I’m pretty sure that the >> 200OK that’s getting re-written is properly constructed. I >> guess I’m trying to understand when one would want to use >> this test? >> > > Although we weren’t able to come up with an example for this test, it > does not seem to apply to my environment. Updating the flag to 1 > solves my issue. This is when the sip message was sent from a.b.c.d and the Via header has x.y.z.w. if you get a pcap with the request, we can check and see if the test is true for it.
On the other hand, you should use set_contact_alias()/handle_ruri_alias() instead of fix_nated_contact() (see how default kamailio.cfg does it) -- it is safer for such cases and avoids getting in troubles with devices that are strict in checking if the r-uri is the contact they set previously. Cheers, Daniel -- Daniel-Constantin Mierla http://www.asipto.com - http://www.kamailio.org http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
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