nmap -sT and open ports from a friends

[Mark-Walter@t-online.de]

Hi,

this is the nmap -sT scan from a friend:

> nmap -sT internet_address

Port 	 State		Service
25/tcp   filtered        smtp
46/tcp   open            mpm-snd
80/tcp   filtered	http
119/tcp	 open		nntp
445/tcp  filtered	microsoft-ds
1080/tcp filtered	socks
6000/tcp open		X11
6346/tcp open		gnutella

He has no firewall (like me) as he's saying a firewall is nothing good
and not usefull but there's an open X11 server available in the
internet.

Isn't this vulnerable without a firewall ?

-- 
Best Regards, 

Mark