We’re using Cloudflare for many our sites. And now we have some problems with an access to some them. When we try to open some of these sites, sometimes they open and sometimes they don’t.
The site can be open in firefox, but not in chrome. Or the site can be open in chrome and not in firefox.
The site can be opened in normal mode in the same browser, but not in private mode.
Chrome error “ERR_CONNECTION_REFUSED”
Firefox error “NSS_ERRORR_CONNECTION_REFUSED”
All of these sites aren’t opening when are addressing to IP 126.96.36.199 and 188.8.131.52. If the site goes to another Cloudflare IP - it works without problems.
When sites don’t open.
TCP connection with IP addresses 184.108.40.206 and 220.127.116.11. The client sends a [SYN] packet to the server, receives a response from IP 18.104.22.168 or 22.214.171.124 [RST, ASK]
When sites open.
- Connection using the QUIC protocol with IP addresses 126.96.36.199 and 188.8.131.52.
- TCP connection with IP addresses 184.108.40.206 and 220.127.116.11. The client sends a [SYN] packet to the server, receives response from IP 18.104.22.168 and 22.214.171.124 [SYN, ASK]
How can it be fixed?