Hi,

I configured dhcrelay on my shorewall router to send DHCP requests to
a remote DHCP server. I need to listen for DHCP requests on on one
interface (say lan.1). However, this interface has multiple IP
addresses/netmasks. The remote DHCP server has only one scope and only
one of the IP addresses of lan.1 is within that scope (say,
10.215.111.254/24). When sniffing traffic on the remote DHCP server, I
see that the source IP address is one of lan.1's but out of scope (eg.
10.215.144.91). I managed to "fix that" with an SNAT rule, so now I
see that the source IP address is the "right one", eg. 10.215.111.254.
However, a wireshark dump shows me that within the DHCP protocol
messages (DHCP Discover) the "relay agent IP address" is still out of
scope (eg. 10.215.144.91).

I tried to search the dhcrelay man page to see if I could manually set
this address.

I don't believe there's any way SW can do this, right?
This is more of a protocol issue, right?

Regards,

Vieri


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