sipxproxy running out of sessions

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Marcel Manzardo

Jul 10, 2021, 2:52:26 PMJul 10
to sipxcom-users
Every couple of days, the system loses all registrations.
Restarting the sipxproxy brings the phones back. So I looked for sipxproxy logs and found the following in the sipxproxy-alarms.log:

"2021-07-10T08:36:55.240457Z""ALARM_PROXY_RAN_OUT_OF_MEDIA_RELAY_SESSIONS failed to allocate a new session - ran out of bridges (max = 125)"
"2021-07-10T08:36:55.241170Z""ALARM_PROXY_RAN_OUT_OF_MEDIA_RELAY_SESSIONS failed to allocate a new session - ran out of bridges (max = 125)"
"2021-07-10T08:36:55.324023Z""ALARM_PROXY_RAN_OUT_OF_MEDIA_RELAY_SESSIONS failed to allocate a new session - ran out of bridges (max = 125)"

This is on sipXcom (20.04.20200422050452), single server on Azure.
No cluster, 2 active phones, 5 registrations, only a handful of calls/day. So not a performance problem

 free -h
              total        used        free      shared  buff/cache   available
Mem:           3.7G        3.1G        136M        200M        522M        202M
Swap:          2.0G         77M        1.9G

Not sure how to check whether spammers are flooding the system which might be a possible cause.

Any help is greatly appreciated.

kind regards,


Matt Keys

Jul 11, 2021, 3:05:10 PMJul 11
to sipxcom-users

Marcel Manzardo

Jul 13, 2021, 2:23:47 AMJul 13
to sipxcom-users
Thank you, I will have a look and report back.

kind regards,

Dave Kitabjian

Jul 13, 2021, 2:20:21 PMJul 13
to Marcel Manzardo, sipxcom-users

You can start by going to:


System-->NAT-->Server Config--><select server>-->Advanced


and Raise End RTP port as needed.


If you still run out, perhaps your sockets are not freeing up. Check netstat.



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Matt Keys

Jul 19, 2021, 7:29:31 AMJul 19
to sipxcom-users

Find out why your ports are being exhausted first and address that. Increasing the range can cause port conflicts with other services.
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