restart iptables from shell script hangs unitl button is pressed

saiyen2002 · 10-29-2010, 10:11 AM

I am trying to restart iptables from within a shell script. I guess I am missing something very basic since I stripped the shell script down to just the iptables restart command yet still I am having problems.

What happens is that the iptabels starts the restart process but hangs at 'Unloaded iptables modules:'.

It will stay there forever until any key is pressed, after that it completes the restart.

my file test.sh looks like this

Code:

#!/bin/bash

/etc/init.d/iptables restart

The output looks like the following

Flushing firewall rules: [ OK ]
Setting chains to policy ACCEPT: mangle filter nat [ OK ]
Unloading iptables modules:
[ OK ]
Applying iptables firewall rules: [ OK ]
Loading additional iptables modules: ip_conntrack_netbios_n[ OK ]

I am using Centos 5.4 2.6.18-164.el5. I am executing the script as root

feinbein · 10-30-2010, 04:17 AM

Just a dirty hack but can you try instead:

Code:

#!/bin/bash

/etc/init.d/iptables stop
/etc/init.d/iptables start

saiyen2002 · 10-31-2010, 05:39 PM

feinbein, I tried what you said, but it still hangs at unloading iptables modules.

I have noticed that this is something which is only relative to the boxes that I am working on, which is my test environment.

Iptables restarts fine within my live environment, which uses centos 5.5 instead of centos 5.4, which is my test environemnt

dive · 10-31-2010, 06:19 PM

Do you really _need_ to unload the modules on stop?

saiyen2002 · 11-01-2010, 12:12 PM

What I _need_ to do is to restart the iptables.
doing that via the init script involves unloading the module.

Is there another way to do this?