Re: Proxy ARP.

[Mike Fedyk <mfedyk@matchmail.com>]

On Mon, May 07, 2001 at 04:31:14PM +0200, Lars Hallberg wrote:
> Hello
> 
> I am setting up a kernel 2.4 machine as a router/fw. I have used a 
> 2.0 kernel before and then I added proxy arp statment by hand. 
> 
> That dont seem to work i 2.4, on the other hand it is suposed to 
> work automagicly??? From arp(7): Linux will automaticly add an 
> non-permanent proxy arp entry when it recives a request for a 
> address it forwards to and proxy arp is enabled on the resiving 
> interface.
> 
> What exactly do "proxy arp is enabled on..." mean. Howe to check, 
> how to enable?
> 
> Must somthing be opened in the fw (iptables) for arp to work?
> 

find /proc/sys |grep proxy_arp

echo 1 > .../proxy_arp

... on the interfaces you want proxy arp enabled...

Mike