Caddy TLS handshake error

Question

Simple caddy config

www.example.ga {
    proxy / http://server:12345
}

example.ga {
    proxy / http://server:12345
}

but have infinite count of errors like

92.53.91.128 - No such site at :443 (Remote: 72.210.252.137, Referer: )
TLS handshake error from 68.195.148.47:54875: tls: client offered an unsupported, maximum protocol version of 300

Answer 1

That just means that old clients that don't support modern versions of TLS are trying to connect to your server; usually bots. Version 300 is SSL 3.0, which Caddy does not support because it is old and broken. You can generally ignore these log messages.