Adam Hardy wrote:
Hello List,
after running smoothly for months, my network went snafu today and in
the process of putting it back to normal, I found errors logged into
/var/log/messages from dhclient on my main workstation.
I didn't get this issue before IIRC
It makes me wonder if I have installed something from debian which is
causing the problem ('Unable to add forward map...')
I get precious little from my google and mailing list searches. Is this
a problem due to packages like mDNS or Avahi-daemon [1] - or could it
be my iptables rules which have thrown a spanner in the works? (which I
also changed since my dnsmasq install).
Mar 17 16:32:37 localhost dhclient: DHCPREQUEST on eth0 to 192.168.0.2
port 67
Mar 17 16:32:37 localhost dhclient: DHCPACK from 192.168.0.2
Mar 17 16:32:37 localhost dhclient: bound to 192.168.0.235 -- renewal in
1631 seconds.
Mar 17 16:32:38 localhost dhclient: Unable to add forward map from
gondor.localdomain. to 192.168.0.235: destination address required
Mar 17 16:59:48 localhost dhclient: DHCPREQUEST on eth0 to 192.168.0.2
port 67
Mar 17 16:59:48 localhost dhclient: DHCPACK from 192.168.0.2
Mar 17 16:59:48 localhost dhclient: bound to 192.168.0.235 -- renewal in
1226 seconds.
Mar 17 16:59:49 localhost dhclient: Unable to add forward map from
gondor.localdomain. to 192.168.0.235: destination address required
regards
Adam
[1] suspicious:
Mar 17 16:05:33 localhost avahi-daemon[2292]: New relevant interface
eth0.IPv4 for mDNS.
Mar 17 16:05:33 localhost avahi-daemon[2292]: Joining mDNS multicast
group on interface eth0.IPv4 with address 192.168.0.235.Mar 17 16:05:33
localhost avahi-daemon[2292]: Registering new address record for
192.168.0.235 on eth0.
M
It looks like dhclient is trying to update it's DNS records in a DNS
server using the dynamic-dns protocol. I doubt that this is anything to
do with avahi. More likely a change in dhclient configuration.
Do you have something like "do-forward-updates true;" in dhclient.conf?
If you are using dnsmasq, you don't need to use DDNS updates: the
dnsmasq DNS server doesn't support them, but it doesn't need them
because DNS records are inserted automatically from DHCP addresses.
Simon.
