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  • Snep :floofHappy: @40C3snep
    Jul 4, 2025, 12:01 AM

    Fffffffffffuuuuu...

    I've been chasing this problem I've had for days at this point, where I could connect to a bunch of my self-hosted services on a VPS perfectly fine from some internet connections, but fail to connect from others. Mobile data would work just fine e.g. connecting to this Masto instance, but at home or at work, connections were simply refused unless it was an ICMP packet...

    Checked firewalls, traceroutes, local network configuration, client configs, no dice.

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Replies

  • Snep :floofHappy: @40C3snep
    Jul 4, 2025, 12:02 AM

    Turns out: HAproxy on the server side kept crashing for god knows how long now after I removed a domain one of the backends pointed towards, now unable to be resolved. But since it only handled IPv4 connections, those were the only ones that broke.

    At the same time, IPv6 in my home network seems to have fallen over with an unrelated cause and at work, we just don't have IPv6 connectivity. But most mobile providers do offer IPv6 per default, so those connections would work.

    Arggghhh!

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  • Snep :floofHappy: @40C3snep
    Jul 4, 2025, 12:03 AM

    Which also explains why my vault wouldn't sync being on a two week on-site work trip, since the network there is also pure legacy IP (unfortunately).

    It all makes sense now!

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  • Snep :floofHappy: @40C3snep
    Jul 4, 2025, 12:08 AM

    Aaaand there's a bunch of posts on the timeline flooding in from other fedi servers that didn't manage to connect via IPv6, look at that x3

    And I can finally adopt my new Unifi switch to the self-hosted controller, yay

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