Tag: IPv4

What happens if an IPv4 client tries to access an IPv6-only server (SOLVED)

Posted by Alex On April 9, 2022

Question: Hey! The article says that IPv6 is a completely different protocol, I had a question. If my recipient's email works only on IPv6 (that is, his mail server listens only through the IPv6 protocol), does this mean that when sending a letter from a mail server that is connected only to IPv4, the letter simply will not reach the...

How to configure Squid to use IPv4

Posted by Alex On June 15, 2021

Because the IPv6 Internet is as fast or faster than the IPv4 Internet for most networks, Squid prefers to connect to websites over IPv6. The “dns_v4_first on” option changes the order of preference so that Squid will first bind to dual-stack websites over IPv4. Squid will still do both IPv6 and IPv4 DNS queries before connecting. A WARNING. This parameter...
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