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