arp proxy

[Dinh Tran]

Hi,

 

I want my machine 192.168.242.1 become a arp proxy for 192.168.242.2. I entered this command:

arp -Ds 192.168.242.2 eth0

 

Using arp -n, I verify that 192.168.242.2 is displayed on the list. When I try to ping from another machine to 192.168.242.2. I can see a arp who-has arrived to 192.168.242.1 but no reply found.

 

Anyone of you have experience about this please help me!!!!!

Thanks a lot,

Best regards,

 

Dinh Tran

[paul]

does 192.168.242.2 exists?

192.168.242.2 still needs to exist on the network even though you are proxying it.

 

and you should only see the proxied ip from some other network.

example:

10.10.10.10 -> 10.10.10.1 (router) 192.168.242.1 / proxyarp 192.168.242.2 -> 192.168.242.2

 

so if you are on the 10.10.10.10 machine you could ping 192.168.242.2 and get a response from the proxied IP address

[Dinh Tran]

No, it doesnt exist. But I think we dont need that, right?

[paul]

proxyarp forwards the request to the real interface, so the IP needs to exist first.

 

if you want to have move than one IP on a machine then you need to use interface aliases not proxyarp