http: TLS handshake error

[ammnt]

Hello,

VPS, Debian 9, AGH 0.99.2. I'm not sure it 's a bug. But when I use the web-interface, i at once see a errors in the log:

2019/11/08 20:58:50 http: TLS handshake error from IP:53525: EOF
2019/11/08 21:37:59 http: TLS handshake error from IP:55822: EOF
2019/11/08 21:45:27 http: TLS handshake error from IP:56389: EOF

I use a certificate from Lets Encrypt for DoH, DoT, and HTTPS. DoT/DoH handshakes works without any errors. Tests on ssllabs.com and sslshopper.com successful. I can send the configuration file, domain and full logs to devteam@adguard.com.

Something similar is described here:
https://stackoverflow.com/questions/34823724/golang-tls-handshake-error
https://stackoverflow.com/questions/39547459/golang-http2-and-tls-handshake-errors

Thank you.

[ameshkov]

This means that the client closed connections unexpectedly, this is not really a problem.

I think we should simply log this with DEBUG level, not ERROR.

[szolin]

These don't seem like our log messages. What application writes these logs?

[ameshkov]

@szolin it's ours of course. We should've configured ErrorLog *log.Logger for the http.Server instance.