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Is it possible to restrict all connections to an IPV6 address?

I've set

onlynet=ipv6
bind=::

But it seems that nodes are still attempting to connect to an IPV4 address (in addition to the IPV6 address). Is there any way to prevent this? I am seeing discover and addlocal both being set to the IPV6 address on startup.

Thanks!

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1 Answer 1

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2

onlynet only affects outbound connections.

If you only want inbound IPv4 connections (why?), you'll need to either:

  • Patch Bitcoin Core to bind to IPv6 addresses in IPV6_V6ONLY mode (see CConnman::BindListenPort in src/net.cpp)
  • Use some firewall rule on your system to prevent incoming IPv4 connections to it
  • Make sure you only have a publicly-reachable IPv6 address
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2
  • 1
    I am only looking for IPv6 connections. I don't really want my IPv4 address being leaked.
    – Dave
    Jan 10, 2021 at 18:25
  • 1
    Is this still true and we need to patch Bitcoin Core for using this option?
    – user103136
    Sep 1, 2021 at 0:34

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