Scenario:
dnsmasq running on openwrt box, to provide dhcp/dns for local network, Win 
10/11 client machine, Chrome browser.
Issue:
child processes for TCP requests: in use 0, highest since last SIGUSR1 24, max 
allowed 30. #from dnsmasq.log on openwrt-box

Reason: Some recent change of Chrome, now to use built-in dns-client instead of 
OS-provided client. (This change rather tricky to be disabled.) In case, Chrome 
decides, that entropy of host system regarding outgoing udp-port for dns query 
is not good enough,
Chrome switches to DNS via TCP.
Which might cause bursts of DNS-requests, being throttled by actual default 
max-tcp-connections=20.
Probably, this behaviour was introduced to make dns poisoning more difficult. 

Regards,

Reiner 

_______________________________________________
Dnsmasq-discuss mailing list
[email protected]
https://lists.thekelleys.org.uk/cgi-bin/mailman/listinfo/dnsmasq-discuss