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sysctl.conf resets itself?

I've set up my computer fairly well, but I've one little problem. It would appear that sysctl.conf resets itself to

Code:

net.ipv4.icmp_echo_ignore_broadcasts=1

net.ipv4.icmp_echo_ignore_all=1

instead of

Code:

net.ipv4.icmp_echo_ignore_broadcasts=0

net.ipv4.icmp_echo_ignore_all=0

which I reset it to every time I see this. I haven't managed to see /when/ it does this (on a cold system cycle?), but to fix it, I change the two values, and then do a shutdown -r now, and it comes up pingable again.

Why is this resetting itself? Is there a config file I'm missing?

Found half the problem ... shorewall

Running MDK 9.2 and shorewall was rebuillding this file every time it was restarted. Next obvious question is how to stop this?