Unable to access nginxproxymanager.com after visitng the screenshots page

[junzhengca]

Describe the bug

Unable to access https://nginxproxymanager.com after visiting the screenshots page. Chrome throws ERR_SSL_PROTOCOL_ERROR and here is the curl response:

➜  ~ curl -v https://nginxproxymanager.com/setup/                                                            
*   Trying 2600:9000:2349:8e00:2:8434:1380:93a1:443...
* Connected to nginxproxymanager.com (2600:9000:2349:8e00:2:8434:1380:93a1) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* successfully set certificate verify locations:
*  CAfile: /etc/ssl/certs/ca-certificates.crt
*  CApath: /etc/ssl/certs
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
* error:1408F10B:SSL routines:ssl3_get_record:wrong version number
* Closing connection 0
curl: (35) error:1408F10B:SSL routines:ssl3_get_record:wrong version number

This happens on both my Chromebook on version 100.0.4896.133, and my iMac on Monterey.

To Reproduce Steps to reproduce the behavior:

1. Go to screenshots page on the official website
2. Reload
3. Gets SSL error

Expected behavior

Should be able to access the website normally.

[the1ts]

No idea why the error, can't reproduce as I can't use IPV6 here, but the fact that its using IPV6 may help narrow it down. Are you for instance able to lookup in DNS for IPV6 addresses, but not reach anything on IPV6?

[junzhengca]

I am able to use ipv6 for other websites with no issues at all. It shouldn't be an issue with ipv6.

Also, getting the same error with -4 flag.

➜  ~ curl -v -4 https://nginxproxymanager.com/setup/ 
*   Trying 18.67.17.36:443...
* Connected to nginxproxymanager.com (18.67.17.36) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* successfully set certificate verify locations:
*  CAfile: /etc/ssl/certs/ca-certificates.crt
*  CApath: /etc/ssl/certs
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
* error:1408F10B:SSL routines:ssl3_get_record:wrong version number
* Closing connection 0
curl: (35) error:1408F10B:SSL routines:ssl3_get_record:wrong version number

[github-actions[bot]]

Issue is now considered stale. If you want to keep it open, please comment :+1: