On Sun, Nov 9, 2008 at 4:37 AM, Elvir Kuric <[EMAIL PROTECTED]> wrote: > Hi all, > > I am playing with pf tool on openbsd/freebsd platforms and it is super > tool for firewalls. On thing is interesting for me, and I am hopping > someone has expeience with this. > > If I say > > block log all > block in log (all) quick on $ext_if proto udp from any to $ext_if > > this would block all traffic on $ext_if, but on my ext_if I recive a > lot of ( huge amount ) of udp generated traffic which make me a lot > of problems. > I also tryed to add small pipe and play with ALTQ to handle this but > it did not help a lot. Also I know that every packet which hit my > ext_if should be > processed ( or least take a little processor resources, if I block > it with keyword quick ), but I am wondering is there some way to > decrease impact on system > when a lot of packets arive in short time. > > My question would be, what are your experinces with battling against > boring udp flooders ? Platform are FreeBSD / OpenBSD and all works > like a charm except time to time, stupid udp flood atacks. >
Not sure if this will help in your situation, but you could try setting the 'blackhole' for UDP. (There is also one for TCP.) net.inet.tcp.blackhole net.inet.udp.blackhole -- Glen Barber "If you have any trouble sounding condescending, find a Unix user to show you how it's done." --Scott Adams _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-pf To unsubscribe, send any mail to "[EMAIL PROTECTED]"
