[pkg-dhcp-devel] Bug#648401: Bug#648401: isc-dhcp-relay: dhcrelay(8) doesn't mention need for -i on server facing interface

[Michael Gilbert]

control: forwarded -1
https://lists.isc.org/pipermail/dhcp-hackers/2013-February/002007.html

> Here's a patch that fixes the problem for us. It makes dhcrelay listen on all
> interfaces and relay BOOTREPLY packets from them, but still only rely
> BOOTREQUEST packets from requested interfaces (those with -i).
>
> What it _doesn't_ fix, is that dhcrelay should only relay broadcast packets
> (e.g. DHCPDISCOVER); the unicast packets (e.g. DHCPREQUEST) can already find
> their way through, so you end up with duplicates. Those are largely harmless,
> though, so I consider fixing that out-of-scope for the wheezy freeze; this is
> the minimal patch that I could find.