On Mon, 23 May 2005, Tony Shadwick wrote:

Is there an effective way to manage that list? I mean, it seems to me that you'd be adding mass routes to /etc/rc.conf. How are you going about this.

See
http://public.natserv.net/blackholing.tar.bz2

I put a shell script, an awk file and a mini readme.

Otherwise, it sounds like very good advice.

It is not without it's problems...
In particular one needs to clean the sshd.log file every time one runs the program. I may improve it later.

Of course, I tend to manage a
hardware firewall in front of any of my machines, so the blackholing should really occur there.

That would be one possible place.


I wonder if that technique works under Linux as well?

Don't know. If you have access to a Linux box you could man route and see. It possibly could exist there too.

manage reading my firewall rules. ;)

I found it got too messy to read firewall rules when I had blackholing there too. Also the feedback I got was that firewall rule was a flat list, while the route system used some type of tree.

In all honesty my machine has so little traffic that I doubt either way would be much of an issue. I just found it simpler to manage having the blackholing outside the firewall rules. That way the firewall rules are "generic" to ports and few IPs.
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