It whatever Raspbian and the router do by default, although I do use an iptables firewall. I normally don't see any IPv6 from the other Pis, so maybe something to do with localhost and the loopback interface. Cheers On Sunday, 21 July 2019, 2:45:59 pm AEST, Amos Jeffries <squid3@xxxxxxxxxxxxx> wrote: On 21/07/19 4:20 pm, Mark James wrote: > Doing an “apt update” on the squid machine got another TCP_MISS_ABORTED for ::1 and then subsequent IPv4 requests from other Pis get the TCP_REQUEST_UNMODIFIED. > That hints that there is something broken in your local network IPv6 connectivity. Perhapse ICMPv6 is not working properly? Amos _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users