Re: Stranges with ARP

2005-08-12 Thread Jeremie Le Hen
Hi Claudio, Steve, > > While user is blocked by _our_ generated MAC! Btw, could anyone advice > > me how to block user IP block without touching ipfw (I think to use > > route + ``-blackhole' to that user that have no his MAC in my ARP > > table), any ideas? I'm just wondering why you don't want

Re: Stranges with ARP

2005-08-10 Thread Sten Daniel Sørsdal
Steve Langdon wrote: > Sten, thanks for helping me. > > Another question: ``route -blackhole' is the same thing like ``arp -S [IP] > 00:00:00:00:00'? So packet will ignore on router. Or not? > > -blackhole would drop any packets matching that route. That is, it drops packets coming from say the

Re: Stranges with ARP

2005-08-10 Thread Claudio Jeker
On Wed, Aug 10, 2005 at 05:07:27PM +0400, Steve Langdon wrote: > Hello all. > > Help me to solve a strange conduct. > I want to have permanent bundle with IP->MAC for users in our network to > have some security. So, once my user's MAC doesn't appear in my ARP > table, I have to block by ``arp -S

Re[2]: Stranges with ARP

2005-08-10 Thread Steve Langdon
Date: Wed, 10 Aug 2005 15:35:17 +0200 Subject: Re: Stranges with ARP [snip] > Using static arp is a very VERY bad idea. > Consider an flood attack against this IP. All packets will be sent to > ALL clients and you would have a hard time tracking down the problem. > > Ju

Stranges with ARP

2005-08-10 Thread Steve Langdon
Hello all. Help me to solve a strange conduct. I want to have permanent bundle with IP->MAC for users in our network to have some security. So, once my user's MAC doesn't appear in my ARP table, I have to block by ``arp -S ..' his IP with MAC generated by my script with prefix d1:fa:28. One da