How to protect FreeBSD from IP spoofing ?

Adrian Penisoara ady at
Tue Feb 17 09:22:59 PST 2009


  Check the ipfw(8) manual (includes examples) or rather go for pf
(packetfilter) and check the pf.conf(5) manual. For pf you just need to add
something like "antispoof for lo0".


On Tue, Feb 17, 2009 at 3:24 PM, Blog Tieng Viet <blogtiengviet at>wrote:

> Dear all.
> I am a newbie of FreeBSD, would like to get alot of information about
> FreeBSD such as IPFW.
> I am annoyed by IP spoofing but dont have any way to prevent it.
> Can any one tell me how to do ?
> Thanks in advance.
> PS:
> I am using 6.4-PRERELEASE FreeBSD 6.4-PRERELEASE.
> The FreeBSD box is used for web server, and it is forwarded every parket of
> port 80 from LAN router.
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