Hi, in these dark days of COVID-19 lockdown I’m using linphone to connect to my office asterisk system for working from home.

It’s going pretty well but the presence/BLF functions don’t appear to work.

In the linphone logs and asterisk debug I find that asterisk is rejecting linphone’s PUBLISH message:

<--- SIP read from UDP:10.27.128.3:5060 --->
PUBLISH sip:john@xxx.xxx.com SIP/2.0
Via: SIP/2.0/UDP 10.27.128.3:5060;branch=z9hG4bK.GRd5yC7Wo;rport From: ;tag=ZtFgBTxUL
To: sip:john@xxx.xxx.com CSeq: 20 PUBLISH
Call-ID: SMHLUSLJD6
Max-Forwards: 70
Supported: replaces, outbound Event: presence Accept: application/pidf+xml Content-Length: 511
Content-Type: application/pidf+xml Expires: 3600
User-Agent: Linphone/3.12.0 (belle-sip/1.6.3)

open sip:john@xxx.xxx.com
2020-03-23T09:40:43Z <------------->
— (14 headers 3 lines) —

Sending to 10.27.128.3:5060 (no NAT)

<--- Transmitting (no NAT) to 10.27.128.3:5060 --->
SIP/2.0 489 Bad Event Via: SIP/2.0/UDP
10.27.128.3:5060;branch=z9hG4bK.GRd5yC7Wo;received=10.27.128.3;rport=5060
From: ;tag=ZtFgBTxUL
To: sip:john@xxx.xxx.com;tag=as674d428f Call-ID: SMHLUSLJD6
CSeq: 20 PUBLISH
Server: Asterisk PBX 13.14.1~dfsg-2+deb9u4
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer Content-Length: 0

I can find nothing in the asterisk logs that says *why* it doesn’t like the publish.

Help?

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