Still reading all the options, noticed dns_packet_max is off by default. My squid uses dnsmasq, that has EDNS on by default and it "defaults to 4096, which is the RFC5625-recommended size"
In this case what will happen then? dnsmasq may receive EDNS up to 4K, which squid by default only takes 512Byte. http://www.squid-cache.org/Versions/v3/3.5/cfgman/dns_packet_max.html warns some older resolver does not like EDNS, but dnsmasq has this feature on by default...
Thinking about setting up "dns_packet_max 4096" and see what happens...
Gordon
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