High Sierra: Can't connect to a xampp server running on another machine after upgrading macOS

macos network wifi webserver high-sierra

I am assuming you are using SSL with certificate that is SHA-1 signed, which was still allowed (with a warning) in macOS Sierra but in macOS High Sierra the connections will fail. I suggest you move to SHA-256 signed certificates for increased security and to avoid connection failures.

Source: Apple HT207459

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