[PLUG] iptables question

[Phil Tomson]

Turns out the problem was because I was booting up an older kernel 
(2.4.19mdk) instead of 2.4.21 (the one that came with Mandrake 9.1) 
because the laterr kernel was causing the machine to hang when accessing 
the CDROM.  Now that I've tried it with the 2.4.21 kernel I don't get the 
Invalid argument message.  Must be that the wrong modules were being 
loaded.

Phil

On Wed, 10 Sep 2003, Eric Harrison wrote:

> On Wed, 10 Sep 2003, Phil Tomson wrote:
> 
> >
> >I'm trying to set up masquerading / nat with iptables.
> >
> >I downloaded a simple firewall script to get me started.  The last line of 
> >the script does:
> >
> >iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE
> >
> >However, this returns:
> >iptables: Invalid argument
> >
> >if I remove the '-j MASQUERADE' part of the command, like so:
> >
> >iptables -t nat -A POSTROUTING -o ppp0
> >
> >it's fine, but of course that does nothing....
> >
> >Any idea why it doesn't like: '-j MASQUERADE'?
> 
> Looks like the nat module is not auto-loading.
> 
> Try adding this to the top of your script:
> 
> 	modprobe iptable_nat
> 
> -Eric
> 
> 
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