[Dnsmasq-discuss] dnsmasq 2.90 reply truncated

[Adam Pribyl]

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