Barry Fawthrop wrote:
Hi all
Anyone using a sonicwall firewall ?
I have been and then suddenly it drops UDP packets because SIP is no
longer on port 5060 but some random assigned port ?
Why ?
Which Sonicwall model? Some (like the TZ170) have special VOIP settings,
like "Enable consistent NAT" and "Enable SIP Transformations". Check
those; they work well with SIP.
If you don't have one of these newer models, please see
http://www.voip-info.org/wiki-IAX, in the "NAT Issues" section. It deals
with IAX2, but the issues are same for SIP UDP. The Sonicwall
UDP-connection-memory timeout may be VERY short - 30 seconds by default
on some! It is adjustable in some firmware versions.
I use the TZ170, but with IAX2 rather than SIP.
- Mike
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