Why I cannot find any udp port listening on my RHEL 7 server?

Solution In Progress - Updated -

Issue

  • I could not find any udp 514 port running when I issue the command ss -an | grep udp. I was configuring syslog-ng to listen on both tcp and udp port 514..

Instead , I only see the following:

tcp    UNCONN     0      0           1.1.1.1:514                   *:*
tcp    LISTEN     0      128         1.1.1.1:514                   *:*

Environment

  • Red Hat Enterprise Linux 7.0

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