After upgrade of dnsmasq 2.89 to dnsmasq-2.90-1.fc38.x86_64 I started to
notice, that some queries won't resolve when asked thru dnsmasq, but work
asked directly to upstream nameserver.
I found that certain queries forwarded to anycast bind nameservers
return only a "reply is truncated" message and no record.
Mar 11 07:30:05 server dnsmasq[4054056]: query[A]
login.microsoftonline.com from 192.168.34.194
Mar 11 07:30:05 server dnsmasq[4054056]: forwarded
login.microsoftonline.com to 10.101.255.253
Mar 11 07:30:05 server dnsmasq[4054056]: reply is truncated
Downgrading to dnsmasq-2.89-1.fc38.x86_64 seems to solve the problem.
The response for login.microsoftonline.com is a long one.
In the dnsmasq changelog I found, there were some changes with edns max
size, but I can not find the commit to find out what was there before, to
set the --edns-packet-max.
The general question would be - what is the correct DNS setup then? I
probably need to change the bind config, as I do not want to fix every
dnsmasq "client" in the network.
Thanks
Adam Pribyl
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