[asterisk-users] Digium IP Phones UNREACHABLE after registration

Administrator TOOTAI admin at tootai.net
Thu Apr 12 10:45:52 CDT 2018

Hi Herrmann

Le 12/04/2018 à 17:22, Hermann Wecke a écrit :
> I'm trying to solve a mystery for the last couple of days.
> I have a mix of D70, D50 and D40 behind NAT. Server is in a
> colocation, not a VPS.
> For several years, everything was working fine, no issues. A few days
> ago I started having problems at one particular site. NO CHANGES have
> been made to this office network - same router, switch and internet
> provider. No new equipment added or configuration changed (I only
> upgraded the firmware and asterisk trying to solve the problem).
> A few seconds after registration, the Digium phones will become
> UNREACHABLE. Right after that, the entire VoIP network (where the
> Digiums are located) will be also dropped - all other devices
> (non-Digium) connected will be kicked from the asterisk box. There are
> ObiHai, Yealink and Linksys at this location - all will be kicked.
> The server remains operational and all other users/peers (not running
> Digium phones) are up and running.

Don quite understand: above you say that all others phones are kicked 
too and here you say they are up and running ... Also, UNREACHABLE and 
kick are not the same for me.

> Sip debug and tcpdump didn't show any relevant information to solve
> the puzzle.

What is relevant: do you see SIP traffic coming from those 
phones/location *AFTER* they are UNREACHABLE/kicked?

Is a fail2ban involved ?



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