On 17/07/24 01:31, Rasmus Horndrup wrote:
Hi,
On a dual stack network interface I’m interested in using squid as a ipv6 only
forward proxy.
My general understanding was that squid will prefer to use ipv6 whenever
available, but I’m having issues with squid seemingly preferring ipv4 in some
cases.
I have two examples, where it proceeds using IPv6 for the first and IPv4 for
the second.
From the looks of it, they both successfully receive A and AAAA records, but
how can I basically force squid to use IPv6?
Squid obeys the IPv6 specifications which still require IPv4 transition
capabilities. Including whether you are on an IPv4-only or IPv6-only or
Dual-Stack network.
The best way to make Squid IPv6-only is to make the machine it is
running on IPv6-only.
Alternatively, to setup a firewall rule matching the proxy by PID/UID to
reject TCPv4 connections with an ICMP "(3) Destination Unreachable" packet.
Cheers
Amos
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