After two weeks can't use xchat or others irc clients because no one can communicate through 6667 port.
It´s possible open this port ? how?

You don't need to open the 6667 port in your computer but connect to one that's open in a server.
Maybe you modified your firewall/router to not allow outgoing connections targeting that port.

but mirc use the same port and I can connect me with this program

Hi debora

When you're sending outgoing data, all ports are open unless you specifically close them (with firewalls, blocking).

You only need to open ports if you want incoming data on them.

Example: You don't need to open ports so that you can surf the web or access ftp.. But if you want to create an HTTP or FTP server on your machine, and want people to access it, then you open ports 80 and 21 (for incoming data)

mirc is windows based, right?

My guess is either there is some configuration in xchat you're missing, or there's something in linux blocking port 6667 (doubtful).

Did you try xchat on another computer?
Did you try other linux irc clients? like BitcX ? or maby these ones http://www.linuxpackages.net/search_...e=irc&ver=10.1

I use a router, maybe the problem is in the router, because I tried use BitchX and xchat for windows in the same computer and I can not connect me. Just mIRC work. But I tried use xchat in other computer that don't use the router and the program works fine. My problem now, is: what I can do in the router, because I already disable the router firewall. How I configure the router for don't have this problem?
Another thing is that I was work with BitchX without problem, after I close the program and no more I can use the irc clients... no one... I tried 3 or 4 clients...