We use openvpn for site-to-site connections. A branch office is getting addresses via dhcp. Unfotunately, we cannot bind isc-dhcp-relay on a tun-interface.
Bridging is not an option for us.

I found http://kabru.eecs.umich.edu/bin/view/Main/DhcpRelayUseSocket but this is a slightly different problem.
In our lab, dhcp-relay is not even starting if a tun-interface is supplied.

The last message we get is:

tun0: unknown hardware address type 65534
Then the daemon terminates if started by init-script.

Any help is greatly appreciated!

Regards

Stefan

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)