Hi, I checked my debian-installation today: $ sudo nmap -sS -A 192.168.0.202 Starting Nmap 4.53 ( http://insecure.org ) at 2008-08-18 13:26 CEST SCRIPT ENGINE: rpcinfo.nse is not a file. SCRIPT ENGINE: Aborting script scan. Interesting ports on 192.168.0.202: Not shown: 1712 closed ports PORT STATE SERVICE VERSION 22/tcp open ssh Dropbear sshd 0.51 (protocol 2.0) 6000/tcp open X11 (access denied) MAC Address: B6:EA:FE:36:73:B3 (Unknown) Device type: general purpose Running: Linux 2.6.X OS details: Linux 2.6.13 - 2.6.20 Uptime: 248.551 days (since Thu Dec 13 23:13:47 2007) Network Distance: 1 hop Service Info: OS: Unix
OS and Service detection performed. Please report any incorrect results at http://insecure.org/nmap/submit/ . Nmap done: 1 IP address (1 host up) scanned in 23.939 seconds Alsa a netstat -tulpen done on the device direclty: # netstat -tulpen Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State User Inode PID/Program name tcp 0 0 0.0.0.0:6000 0.0.0.0:* LISTEN 0 1822 1127/X tcp6 0 0 :::6000 :::* LISTEN 0 1821 1127/X tcp6 0 0 :::22 :::* LISTEN 0 1771 1102/dropbear So the Xserver is listening to tcp-connections by default. Is this necessary? I tried to deactivated but found: debian-gta02:/etc/X11# cat xinit/xserverrc #!/bin/sh # $Id: xserverrc 189 2005-06-11 00:04:27Z branden $ exec /usr/bin/X11/X -nolisten tcp #!/bin/sh # $Id: xserverrc 189 2005-06-11 00:04:27Z branden $ exec /usr/bin/X11/X -nolisten tcp So it seems to be already deactivated and should run __without__ an open port because of -nolisten tcp. But why is the port open nevertheless? Any idea how to deactivate it?
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