[asterisk-users] problems with natted phones

[Marek Greško]

Hello,

I confirm temporarily allowing all the udp communication from the nat
ip address solved the problem, so the problem lies in the nftables.
This is probably not the right forum to continue. Or is it? Does
anybody have wide experience with nftables and sip?

Thanks

Marek


2021-09-07 10:40 GMT+02:00, Antony Stone <Antony.Stone at asterisk.open.source.it>:
> On Monday 06 September 2021 at 23:05:27, Duncan Turnbull wrote:
>
>> > On 7/09/2021, at 8:30 AM, Marek Greško <mgresko8 at gmail.com> wrote:
>> >
>> > Hello,
>> >
>> > it is only local nftables with nf_conntrack_sip on the asterisk
>> > server. Probably a kernel bug? It did not trigger with previous
>> > providers since they had working SIP ALG. Now I hear no audio in both
>> > directions because outgoing rtp stream from asterisk goes to private
>> > address space and incoming stream is blocked. So the outgoing rtp
>> > could not be learnt to send to nat addess.
>>
>> Maybe a bug but that’s less likely than a config error. Time to debug your
>> nftables.
>
> Try temporarily simply turning the firewall off - allow all traffic through
> (although leave in place any NAT rules).
>
> If you then find that RTP works, you know where the problem lies.
>
>
> Antony.
>
> --
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