[rbak-nsp] dhcp only on interface

[David Freedman]

Do you mean like, redback "secured arp" ?

"When secured ARP is enabled, ARP requests received on an interface are not answered unless the request
comes from the circuit known to contain the requesting host. ARP requests are sent by the interface only
on the circuit known to contain the target host, and are not flooded to all circuits bound to an interface
"

I believe with this configured on an interface , no ARP requests are answered unless the requesting host has made themselves known to the redback (in your case , via DHCP)



------------------------------------------------
David Freedman
Group Network Engineering 
Claranet Limited
http://www.clara.net



-----Original Message-----
From: redback-nsp-bounces at puck.nether.net on behalf of Marcin Kuczera
Sent: Sat 8/2/2008 21:33
To: redback-nsp at puck.nether.net
Subject: [rbak-nsp] dhcp only on interface
 
hello,
maybe some of you know the function of "replay only" on MikroTik.
This is something that allows for the communication only hosts who confirmed
their lease of address to DHCP server.
Others with the static IP configuration will not work.

Now, the question - is it possible to do it on RedBack ? (not CLIPS) ?
As far now I saw, that if I enable DHCP on interface and computers
fetch addresses from DHCP, the ARP entry looks like static.
However, dynamic ARP (static IP without DHCP) is still possible.

Is there any method to disable dynamic ARP on particular interface to
make it running what I mentioned about ?

If yes, any method to allow particular MAC/IP (static) to be mixed
with dynamic assignment ?

Regards,
Marcin

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