#962165 isc-dhcp-relay: dhcrelay is listening on all network interfaces instead of specified one

Package:
isc-dhcp-relay
Source:
isc-dhcp
Description:
ISC DHCP relay daemon
Submitter:
Aladdin
Date:
2026-08-05 17:34:30 UTC
Severity:
normal
#962165#5
Date:
2020-06-04 05:20:34 UTC
From:
To:
Dear Maintainer,

Just installed isc-dhcp-relay package on my Buster and noticed one
interesting thing:

/usr/sbin/dhcrelay -d -i eth0 10.10.10.10
Requesting: eth0 as upstream: Y downstream: Y
Internet Systems Consortium DHCP Relay Agent 4.4.1
Copyright 2004-2018 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Listening on LPF/vnet0/
Sending on   LPF/vnet0/
Listening on LPF/lan1vbr/
Sending on   LPF/lan1vbr/
Listening on LPF/lan1vbr-fake/
Sending on   LPF/lan1vbr-fake/
Listening on LPF/dmz1vbr/
Sending on   LPF/dmz1vbr/
Listening on LPF/dmz1vbr-fake/
Sending on   LPF/dmz1vbr-fake/
Listening on LPF/eth0/
Sending on   LPF/eth0/
Sending on   Socket/fallback

As you can see, relay agent is listening on all of my interfaces:/ Why is
that? It seems that because of that I get plenty of the following messages:

dhcrelay[4114]: Discarding packet received on vnet0 interface that has no
IPv4 address assigned.

Is it possible to fix such behavior?

#962165#10
Date:
2026-08-05 17:31:09 UTC
From:
To:
Dear submitter,

as the package isc-dhcp has just been removed from the Debian archive
unstable we hereby close the associated bug reports.  We are sorry
that we couldn't deal with your issue properly.

For details on the removal, please see https://bugs.debian.org/1143544

The version of this package that was in Debian prior to this removal
can still be found using https://snapshot.debian.org/.

Please note that the changes have been done on the master archive and
will not propagate to any mirrors until the next dinstall run at the
earliest.

This message was generated automatically; if you believe that there is
a problem with it please contact the archive administrators by mailing
ftpmaster@ftp-master.debian.org.

Debian distribution maintenance software
pp.
Thorsten Alteholz (the ftpmaster behind the curtain)