Re: loop back iptables

[Dan Ritter <dsr@randomstring.org>]

On Tue, Oct 08, 2013 at 03:04:14PM -0700, james gray wrote:
> working with Debian 7.0
> 
> 
> working with the examples at
> 
> https://wiki.debian.org/iptables
> 
> 
> when i write a example for a lo0 table as shown
> 
> -A INPUT -i lo -j ACCEPT
> 
> 
> and follow procedure of
> 
> iptables-restore < file-name
> 
> 
> i do receive a message "line failed" for that line as shown above.
> 
> 
> Question: do i need to config a file.
> 
> 
> staying in the environment of the istalled Debian 7.0 and doing apropos
> loopback shows alsoloop.
> 
> doing internet searching shows a lot of info as if a bomb droped from the
> sky - but who knows if it is or could be debian 7.0 specific.

First, you should probably avoid doing anything to a loopback
interface...

Next, you'll need to copy the entirety of the grey area example
to a file, and use that file name in the iptables-restore. It's
a very specific format.

If you want to test individual rules, you could do this at the
command line:

iptables -A INPUT -i lo -j ACCEPT

and then

iptables -L

to see if it took.

There is nothing Debian-specific going on here.

-dsr-