[asterisk-users] Asterisk16 - PJSIP - Error 401 on outbound registration

Administrator admin at tootai.net
Fri Jan 17 04:54:32 CST 2020

Le 15/01/2020 à 19:24, Administrator a écrit :
> Hi all,
> we face a strange behavior while connecting an Asterisk16 instance 
> with PJSIP to 2 providers: we receive error 401 Unauthorized, both of 
> them having Kamailio as front-end. With other providers -we don't know 
> if they run kamailio- registration is just fine.
> One of the provider took a pcap and told us that expiration was set to 
> 0 that's why they don't accept the registration. We took a pcap on our 
> side when SIP packet goes out of our server and we see that the 
> expiration parameter is setted to 3600 !
> Asterisk version is Asterisk 16.2.1~dfsg-1+deb10u1 on Debian 10 up to 
> date. We also installed 16.7 from scratch, same problem. I have to 
> mention that our test asterisk is also a Debian 10 with Asterisk stock 
> 16.7 and _does_ register normally against the same provider :(
> If someone had a clue on this, welcome.

We went a step further: when Asterisk is receiving the 401 Unauthorized 
it doesn't send the Authorization back, insteed it send the Register 
back with the *same* CSeq which it shoudn't. Pjsip is

pabx16*CLI> pjsip show version
PJPROJECT version currently running against: 2.8


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