Remote firewall changes, Was: Newbie Question About System Update
Aristedes Maniatis
ari at ish.com.au
Wed Apr 20 06:20:56 PDT 2005
On 20/04/2005, at 6:05 AM, Scott Robbins wrote:
> (And of course the obvious--DO NOT shut down the sshd daemon.) :)
>
> Ok, everyone who has NEVER ever made that mistake (or locked themself
> out with a firewall rule, accidentally putting it into effect before
> testing) raise their hand. :)
Yes, that would be me. But someone taught me a great trick...the "at"
command. So, just before you blow away your access with changes to
ipfw, do this:
echo "ipfw add 1 pass all from any to any" at now +10 minutes
Then if all goes OK, use atq to remove the queue item. If not, wait 10
minutes...
Ari Maniatis
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