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Old 02-15-2008, 05:45 AM   #1
Registered: Jul 2007
Location: Penang , Malaysia.
Distribution: red hat linux
Posts: 133

Rep: Reputation: 15
Smile unblock vncserver.

Hi, my linux install a vncserver, than i want to active my firewall but i want to lets client to vnc to my vncserver, i already start vncserver: # vncserver

than listen on port 5901. this is vncserver :1

i have turn on my firewall protect, than i issue command:

# iptables -A INPUT -p tcp --dport 5901 -j ACCEPT

But on my client side to try vnc to this vncserver cannot access. Than i on vncserver there issue command:

# iptables -F

than client side can remote control so i confirm problem on iptalbes(firewall).

How to configure iptables(firewall) to lets client to vnc the server example :1 or :2 or :3 (port number: 5901, 5902 , 5903).

Thank you.
Old 02-15-2008, 06:17 AM   #2
LQ Newbie
Registered: May 2007
Posts: 2

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I'm not entirely sure what you're asking, but this article explains a little on secure VNC:

Aside from that, if you could repeat the question...I mean, are you saying you can get it to work with 5901 and you need to get it to work with 5902 etc too? Surely that's just a case of changing the Iptables command slightly?
Old 02-15-2008, 09:29 AM   #3
Registered: Feb 2003
Location: St. Louis
Distribution: RedHat 8
Posts: 262

Rep: Reputation: 31
if I understand you correctly. You can do a multiport like this.

iptables -I INPUT 3 -p tcp -m multiport --dport 5901:5903 -j ACCEPT


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