Block IP

Dirk-Willem van Gulik dirkx at
Tue Nov 25 23:25:13 PST 2003

On Tue, 25 Nov 2003, Grant Peel wrote:

> Can I block a certain IP address at the machine or interface level using
> freebsd? (No at the Apache or Sendmail level).
> CyberLaert monioting one of my hosts at the rate of 1.2 GB oer day!

Easiest and quickest is to install the firewall - if it is not already in
your kernel, simply load it as a dynamic module. In a pinch (and if the
person causing problem is doing this by accident) you can try something
like "route add" which will make the tcp
handshake break. Which may cause the other end to realize somethign is
amiss. But it does not really stop the traffic.


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