GrayLOg with CENTOS 6.X not working via TCP

We can get CENTOS 7 to work with TCP input fine, but not any CENTOS 6… But we can get inputs with UDP to work with CENTOS6 syslog…
Any ideas?
Just installed Friday per given instructions on a CENTOS 7 server.

Have you ever received TCP on your Centos6 server via graylog?
Have you checked the network tr5affic with tcpdump, or your selinux’s log?
You should share logs, configuration to check it.
But for first, you should use port over 1024…

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