[pkg-dhcp-devel] Bug#731449: isc-dhcp-server: Server not removes DDNS if client releases the address.

[Axel Beckert]

Hi again,

Axel Beckert wrote:
> Control: fixed -1 4.2.4-7
> Control: tag -1 + fixed-upstream
[…]
> Holger Sander wrote:
> > The bug is fixed in Debian jessie.
> 
> Marked as such. Thanks for the information.

I can now also confirm that this is fixed in 4.2.4-7.

> We ran into it with Macbook Airs with multiple USB ethernet adapters
> or Macbooks switching from USB ethernet adapters to Thunderbolt
> devices with an included network adapters (i.e. an external screen
> functioning as docking station).

I've backported 4.2.4-7 to Wheezy for us internally. No changes were
necessary. I just had to make sure that it's not built with -j8 since
that fails. (And trying to build the package made me aware of an issue
in my .quiltrc. :-)

I maybe persuaded to do an official backport for Debian if there's
demand -- and the original package maintainers don't object. I'll have
to follow testing for our installation anyway.

The backport works fine:

> Release without DDNS entry removal:
> 
> Dec 17 15:53:50 stock dhcpd: DHCPRELEASE of 192.33.103.157 from a8:20:66:45:50:be (colorado) via eth1 (found)

Now (different guinea pig and the other failover peer this time):

Dec 18 00:15:03 ruchen dhcpd: DHCPRELEASE of 192.33.101.168 from 00:23:54:7b:28:b1 (nemo2) via eth1 (found) 
Dec 18 00:15:03 ruchen dhcpd: Removed forward map from nemo2.dhcp.phys.ethz.ch to 192.33.101.168 

> Switching network adapter to 00:1e:c2:fb:85:b6:
> 
> Dec 17 15:54:34 stock dhcpd: DHCPOFFER on 192.33.100.151 to 00:1e:c2:fb:85:b6 (colorado) via eth1
> Dec 17 15:54:35 stock dhcpd: DHCPREQUEST for 192.33.100.151 (192.33.103.254) from 00:1e:c2:fb:85:b6 (colorado) via eth1
> Dec 17 15:54:35 stock dhcpd: DHCPACK on 192.33.100.151 to 00:1e:c2:fb:85:b6 (colorado) via eth1
>
> No DDNS update:
> 
> Dec 17 15:54:35 stock dhcpd: Forward map from colorado.dhcp.phys.ethz.ch to 192.33.100.151 FAILED: Has an address record but no DHCID, not mine.

Dec 18 00:18:27 ruchen dhcpd: DHCPDISCOVER from 00:80:c9:00:06:50 via eth1 
Dec 18 00:18:28 ruchen dhcpd: DHCPOFFER on 192.33.100.80 to 00:80:c9:00:06:50 (nemo2) via eth1 
Dec 18 00:18:28 ruchen dhcpd: DHCPREQUEST for 192.33.100.80 (192.33.103.253) from 00:80:c9:00:06:50 (nemo2) via eth1 
Dec 18 00:18:28 ruchen dhcpd: DHCPACK on 192.33.100.80 to 00:80:c9:00:06:50 (nemo2) via eth1 
Dec 18 00:18:28 ruchen dhcpd: Added new forward map from nemo2.dhcp.phys.ethz.ch to 192.33.100.80 
Dec 18 00:18:28 ruchen dhcpd: Added reverse map from 80.100.33.192.in-addr.phys.ethz.ch to nemo2.dhcp.phys.ethz.ch 

		Regards, Axel
-- 
 ,''`.  |  Axel Beckert <abe at debian.org>, http://people.debian.org/~abe/
: :' :  |  Debian Developer, ftp.ch.debian.org Admin
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