[CentOS] how to open a tcp port?

>
>
>
>
> The lsof output shows a program named iptrans is listening on 4965.  Try to
> find
> the program using 'locate iptrans' on the machine that has it.  Then use
> 'rpm -q
> --whatprovides pathname' to see what rpm package it was installed from.  If
> it
>

The 'locate iptrans' shows difference between the two machines , so I need
to find the missing package on mine .
Thank you for your help
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