dhcpd sending on the same IP it receives on

[sthaug at nethelp.no]

> If host A sends a packet to host B, it will expect to receive the response from host B's IP address (the IP it sent the packet to).

No, it's not that simple. In the case of TCP you have a *connection*,
and you would expect to receive the response from the IP address you
have *connected* to in the first place.

In the case of UDP, you would normally expect to receive the response
from the "closest" interface, *unless the application has taken care
to bind a separate file descriptor for each interface* (BIND for
instance does this).

Steinar Haug, Nethelp consulting, sthaug at nethelp.no