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[tech] IPv6 addresses in URLs

Stephane Bortzmeyer stephane at sources.org

Sat Apr 17 11:26:12 BST 2021

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On Thu, Apr 15, 2021 at 08:51:33PM +0000, nervuri <nervuri at disroot.org> wrote a message of 40 lines which said:

No SNI vs empty SNI - we could test to see if servers have a problem
with either.

For instance, egsam.glv.one reacts badly when you don't send a SNI:

% gnutls-cli -p 1965 --disable-sni --insecure egsam.glv.one Processed 0 CA certificate(s).Resolving 'egsam.glv.one:1965'...Connecting to '52.51.189.88:1965'...*** Fatal error: The TLS connection was non-properly terminated.

While it works otherwise.