[ILUG] really being specific with iptables.

[Dermot O'Dwyer]

On 09/01/2008, Darragh <lists at digitaldarragh.com> wrote:
> the second command does not return an error at the command line however
> the first and the third are not excepted at all.  Interestingly, when I
> use -s !192.168.2.0/24 I get a very strange error about trying to cat
> squid.conf  when I press up arrow when trying to reenter the command I see
> that it's actually putting in a command at the start of the IP address
> that I typed days ago.
> I've a feeling it's some kind of very strange bug.
>
> Can anyone indicate where I'm going wrong with these commands?
>

Can't help you much with the iptables but the ! construct in bash is
history substitution.
e.g run the history command and there are few example lines:
  491  screen
  492  screen -R
  493  mutt
  494  opera&

Then running !492 will run the 'screen -R' command again.

So it looks like !192 is being interpreted as inserting line 192 from
the history and then it runs the command. From looking at the iptables
command you may need a space after the !

Regards,
Dermot