this post was submitted on 04 Oct 2023
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Enabling IPv6 support for IPv4-only apps on Linux (blog.apnic.net)
submitted 1 year ago by JimmyWorldEater to c/linux
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[โ€“] [email protected] 6 points 1 year ago* (last edited 1 year ago) (1 children)

Yeah, no.

I'm not going to LD_PRELOAD some random library into my SSH process, and I'm definitely not going to export LD_PRELOAD as a global environment variable.

Couldn't this be setup with some kind of virtual IPv4 interface that routes to your IPv6? I guess you'd need some kind of driver to add the prefix.

Edit: I think this is supported by the standard 4-in-6 tunnel interface: https://serverfault.com/questions/422791/which-software-could-i-use-to-setup-a-4in6-ip-tunnel-rfc-2473-on-gnu-linux

[โ€“] frog 2 points 1 year ago

Yeah I'm pretty sure with some simple virtual network bridges and routing rules a 4-to-6 converter is plenty possible without touching the actual processes.