[VoiceOps] Screwy DSL modem NAT troubles

[Tim Bray]

On 22/02/11 15:57, Carlos Alvarez wrote:
>
> Carlos Alcantar wrote:
>> Linksys ALG seems to break everything sip on the firewall side
>> sonicwall seems to be the death of sip.
>
> We have around 100 sites using Sonicwall. We turn on NAT transormations
> and the SIP ALG and see 100% reliability.
>
> Agreed on the Linksys ALG, not needed, breaks everything.

It often depends on the type of phones.  For instance on a Snom phone, 
switch off GRUU and you get much less breakage through ALGs.


Tim