Hi everyone,
I'm having trouble accessing my local network devices (a 3D printer and Raspberry Pi) using short hostnames like "http://impressora3d" or "http://impressora3… (xem thêm)
Hi everyone,
I'm having trouble accessing my local network devices (a 3D printer and Raspberry Pi) using short hostnames like "http://impressora3d" or "http://impressora3d/". Firefox keeps blocking the connection with the "Looks like there’s a problem with this site" error page.
I've captured a network log using 'about:networking' and I can see that:
1. DNS resolution works perfectly and points to my local IP:
"CompleteLookup: impressora3d has 192.168.1.10"
2. Firefox is upgrading the request to HTTPS (port 443) automatically:
"nsSocketTransport::ResolveHost [...] impressora3d:443" -> "pushing io layer [0:ssl]"
3. The device rejects it because it only listens on HTTP (port 80):
"Bad Socket 804b000d" (NS_ERROR_CONNECTION_REFUSED)
What I have already tried:
- Disabled "HTTPS-Only Mode" entirely in settings.
- Checked "Secure DNS" (DoH) settings (set to Increased Protection and added exceptions).
- Cleared history and used "Forget about this site" on the hostname.
- Typed "http://" explicitly.
Firefox still refuses to connect via plain HTTP (port 80). Is there any hidden 'about:config' preference or HSTS cache forcing this behavior for local unformatted domains?
Thank you!