[Asterisk-Users] nat=yes and qualify=yes viable NAT solutions?

[C F]

Sipura works, I never tried linksys, Polycom might and might not work.

On 2/26/06, Damon Estep <damon at suburbanbroadband.net> wrote:
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> Looking for some feedback on whether nat=yes and qualify=yes will provide a
> workable solution in many cases?
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> The * server is on a public address, no NAT, the UAs (sipura, linksys,
> polycom) are behind various types of NAT.
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> Obviously port mapping in the NAT device works, but what about cases where
> there is no admin access possible to the NAT device?
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> From what I have read nat=yes makes asterisk look at the udp header instead
> of the SIP info for the UA IP address, and qualify=yes sends keepalives in
> the form of frequent SIP OPTIONS queries. I think I also read that nat=yes
> enables symmetrical RTP
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> What I do not know is does it work in the real world?
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