Firewall Problem on Debian 5.0 Linux

Asked By 0 points N/A Posted on -

Need a little help here.

My server went offline yesterday. After doing portscan it turned out that all the ports are filtered :

Starting Nmap 5.00  Click  at 2012-06-01 14:28 UTC

All 1000 scanned ports on ( are filtered

Nmap done: 1 IP address (1 host up) scanned in 201.06 seconds

So I figured out it's the firewall. Now I can only start server in recovery mode to access data.

How do I flush Iptables in this case?

I have tried to put "iptables -F" in rc.local and then rebooting, but that didn't work out so far.

any ideas?

Best Answer by Maybt Barton
Answered By 0 points N/A #142146

Firewall Problem on Debian 5.0 Linux


It is not a firewall problem, It's a bug in Debian 5.

That's why you are encountering a problem.

It doesn't work correctly with your NIC in your hardware.

I suggest you should upgrade to squeeze

Best Answer
Best Answer
Answered By 0 points N/A #142147

Firewall Problem on Debian 5.0 Linux


Good day!

I assumed you were frustrated about this because your server went offline, and it is not your firewall that have caused this. in order to resolve this follow these simple steps to flush all iptables :
A. Open and used a text editor like VI then Create /root/fw.stop /etc/init.d/fw.stop script
echo "Stopping firewall and allowing everyone…"
iptables -F
iptables -X
iptables -t nat -F
iptables -t nat -X
iptables -t mangle -F
iptables -t mangle -X
iptables -P INPUT ACCEPT
iptables -P OUTPUT ACCEPT"
B. Examine if you can really execute the script.
# chmod +x /root/fw.stop
C. Run the script : 
# chmod +x /root/fw.stop
Hope I have helped you!
Take care!

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