How to open a port?

[Daniel Carrera]

Hello,

I want to allow remote X connections. Could someone tell me how to open 
UDP port 177 or TCP port 6000?

I tried using iptables:

iptables -A INPUT -p udp -i eth1 --dport 177 -j ACCEPT

But this didn't work:
* The Ubuntu 'scan' program (System > Admin > Network tools) didn't see 
that port open.
* I can't establish a remote X session.

Could someone tell me how to open those ports in Ubuntu?

Thanks,
Daniel.
-- 
"It's like a rainbow. Without an observer at a 23 degree angle to
the light reflected a cloud of spherical droplets, there is no
rainbow. The whole universe is like that. Our spirits stand at a
23 degree to the universe."  -- Zoya Boone, Red Mars