[CentOS] portmap/NIS mystery

[m.roth at 5-cent.us]

Boris Epstein wrote:
> Hello all,
>
> I have a server on my private network that is configured as an NIS server
> and mapped to a "public" IP address on a firewall. All other TCP ports
> (SSH, iperf, you name it) are visible from the outside - but the
> portmapper-managed ports (port 111 itself and the YPSERV/YPXFRD ports,
> etc.) are not visible from the outside - even though they are alive and
> well on the internal network.
>
> So, here's the question: is there anything special as far as portmapper's
> networking/security setup that is at play here?
>
Is it open to the correct destination in iptables?

      mark