DHCP Relay over transit-network

Muenz, Michael m.muenz at spam-fetish.org
Tue Dec 30 11:59:10 UTC 2014

Am 30.12.2014 um 12:24 schrieb Simon Hobson:
> Just bear in mind that I've limited experience with the ISC relay 
> agent ... That doesn't sound right. The relay agent on firewall 1 
> should be using an address in the subnet as that is how 
> the server identifies the packet as coming from that subnet. But can I 
> clarify, is the in the packet header source address, or the 
> DHCP GI-Addr field ? The server should not have a problem with it in 
> the packet header as long as the GI Addr field is correct. Does each 
> server have a route to the subnet ?

Thanks for your fast reply Simon! is the source address of the dhcp packet (FW1), as it is the 
nearest interface to the dhcp server. I've also tried to do source nat 
on the firewall, so that the packet came from, but also no 
reply from the dhcp.
In the man page, there's an option to modify the GI field (-m), but I 
can't find any examples on the net for my case.

Best regards

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