Hi Nick,

Thanks for the suggestions. I tried commenting out all the extra stuff (which is not new - been there for years) and same thing. The extra DNS server is AD - you are correct. Might have a more aggressive fiddle with it next week when users are not in school (might zap to 7.2 - should not take long). At least as far as users are concerned its all working - as I said quite possibly been like this for a long time. Interesting tip about putting modifications into a different file - thanks.

Roger

You've done more changes than that. I think a basic file looks something like:

bogus-priv

conf-dir=/etc/dnsmasq.d

dhcp-authoritative

dhcp-lease-max=1000

domain-needed

domain=howitts.co.uk

expand-hosts

no-negcache

resolv-file=/etc/resolv-peerdns.conf

strict-order

user=nobody

I also made changes but I think this is the 6.x original. You've add an alternative DNS server for your LAN devices (for AD?) and made a few other tweaks.

FWIW, I recently realised that if you want to make additions to the file you can make them to a file /etc/dnsmasq.d/anything.conf which will separate your additions from the base file. dnsmasq does, however, complain if you repeat a parameter in different files.

Hi,

I tried commenting out that line (used as we images PCs with FOG (on a ubuntu server - the 192.168.10.8) - which works fine). Got the same error - so must be something else. However, everything appears to be working fine and its possibly been like this for months as I seldom touch the server. This one runs 6.7 - we also have a newer 7.2 gateway which does not have the issue - so maybe time to rebuild unless there are any other suggestions (have not rebooted - but might do next week as people on hols).

Thanks,

Roger

It looks like you have made some changes and configured a PXE server. Have you tried removing your changes to see if it then works?

Hi,

bogus-priv
cache-size=10000
conf-dir=/etc/dnsmasq.d
dhcp-authoritative
dhcp-boot=undionly.kpxe,image.wps.local,192.168.10.8
dhcp-lease-max=4000
dns-forward-max=5000
domain-needed
domain=wps.local
enable-tftp
expand-hosts
no-negcache
port=53
resolv-file=/etc/resolv-peerdns.conf
server=/wps.local/192.168.10.2
strict-order
user=nobody

Is the content of the file.

Roger

That looks OK. DNS generally uses UDP:53 but can fall back to TCP:53 if the UDP replies are bigger than 512 bytes. Then you have IPv4 and IPv6.

I have no idea what could be causing the error as nothing else is listening on 53.

What is the contents of /etc/dnsmasq.conf?

Hi Nick,
Thanks for the reply. The output is:
netstat -tulpn | grep ':53'
tcp 0 0 0.0.0.0:53 0.0.0.0:* LIST EN 32401/dnsmasq
tcp 0 0 :::53 :::* LIST EN 32401/dnsmasq
udp 0 0 0.0.0.0:53 0.0.0.0:* 32401/dnsmasq
udp 0 0 :::53 :::*

Don't know why there are several entries for dnsmasq - looking at the process viewer there is only on dnsmasq listed.
Roger

Is anything else listening on port 53? What is the output of:

netstat -tulpn | grep ':53'