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    socat is great. I used it for years to do ipv4->Ipv6 forward of a VPN service I had

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      That’s exactly the use case I used it for. I bought a cheap VPS with a public IPv4 address and dual-stack v4/v6 internet connectivity, then ran a systemd service that ran socat to pipe several TCP and UDP ports to my home server, which was IPv6 only at the time.

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      I never knew about dual address specifications, fantastic!

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        I’ve been using socat before and it’s a really great and powerful tool. This blog post is a great read for both intro and recap. Thanks for posting.