[asterisk-users] NAT and externip problem or bug

[Julian J. M.]

Have you made sure you are also setting localnet in sip.conf?

externip=1.2.3.4
localnet=192.168.0.0/255.255.255.255

Asterisk won't use externip for devices on your local network.

Julian.

On 7/22/06, Robert Jenkins <raj at jrw.co.uk> wrote:
> Hi,
>
> I've recently got asterisk running on it's own pc inside my firwewall.
> Mostly it's working fine, but there is one silly problem I can't figure out.
> (For reference, Asterisk is the latest stable version as of last weekend
> 14th July. All connectivity is SIP or IAX).
>
> I initially had 'externip' set to my public IP. I have the appropriate 5000
> range ports forwarded to the asterisk PC and external calls seem OK.
>
> The 'local' phones are a mixture of Sipura boxes and softphones.
>
> Problem:
> No or one-way audio in internal calls.
>
> Reason: Asterisk appears to be using the 'externip' address for all SIP
> devices, regardless of their NAT setting.
> Once a call starts, some softphones change the address they are responding
> to & use the external IP rather than the asterisk PCs local IP on the same
> subnet...
>
> I have tried all NAT options and spent quite a while reading everything I
> can find about sip.conf, but I can't so far find any way of changing this
> behaviour.
>
> All the internal phones work fine if I comment out the externip line, but
> then the connections outside the firewall are likely to have problems.
>
> Is there any way of configuring externip on a per-device basis, or should it
> only have effect on NATed devices?
>
> Thanks,
> Robert Jenkins.
>
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