I checked it from home, using nmap (which isn't installed of the maschine in question). I thought it might be safer to check from outside.
could be that your ISP is filtering port 6667. It is commonly (ab)used for IRC and therefor a fairly well known vulnerability. Some ISP's don't want their customers to run servers, the only reason why you might need it. As an 'ordinary' user, you wouldn't be harmed by filtering. Check with your acceptable use policy of your provider.
Hm, haven't thought of this yet. I'll have to check this with our ISP, thanx for the advice.
Hi, however. netstat -anp on the box in question, will show you soon what it is listening on and also assign a proccess to a) each existing connection and b) each listened-for connection. Sascha