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  1. ZABBIX BUGS AND ISSUES
  2. ZBX-25835

Zabbix Server binds to random UDP ports on 0.0.0.0

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    • Icon: Documentation task Documentation task
    • Resolution: Fixed
    • Icon: Trivial Trivial
    • None
    • 7.2.1
    • Documentation (D)
    • None
    • S25-W2/3, S25-W4/5, S25-W6/7, S25-W8/9, S25-W12/13, S25-W14/15
    • 0.1

      Steps to reproduce:
      **

      Just run Zabbix Server

      Result:

      I noticed that at least since upgrading to 7.2.1, the Zabbix Server binds to random UPD ports shortly after startup. They differ after restarting.

      root@zabbix:~# ss -ulp | grep zabbix_server
      UNCONN 0      0            0.0.0.0:48890       0.0.0.0:*    users:(("zabbix_server",pid=3621585,fd=21)) 
      UNCONN 0      0            0.0.0.0:36795       0.0.0.0:*    users:(("zabbix_server",pid=3621597,fd=20)) 
      UNCONN 0      0            0.0.0.0:34756       0.0.0.0:*    users:(("zabbix_server",pid=3621583,fd=21)) 
      UNCONN 0      0            0.0.0.0:53551       0.0.0.0:*    users:(("zabbix_server",pid=3621598,fd=21)) 
      UNCONN 0      0            0.0.0.0:41340       0.0.0.0:*    users:(("zabbix_server",pid=3621584,fd=21)) 
      

       Even with DebugLevel=5 I can't see any relevant log lines as the ports are bound to. 7.0.6 doesn't seem to do this.

      Expected:
      I'd expect Zabbix Server not to bind to any UDP port, especially not globally and undocumentedly. 

            afediuk Andrii Fediuk
            maxried@posteo.de Max Ried
            Team A
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