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I'm having trouble accessing my local network devices with http

Firefox Blockerad applikation/tjänst/webbplats
jbr besvarat
carles5
carles5

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!

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!

Alla svar (1)

jbr
jbr
  • De 10 bästa bidragare

Could you attach a screenshot of the error incl. any "advanced" sections expanded? Thanks.

When you access just the IP it works as expected?

If you force the :80 port http://impressora3d:80 do you get the same, anything else, or something like "record too long" error etc.?

Are you able to open http://httpforever.com/ …?

(Normally I'd suspect an antivirus/security software force upgrading that, but I don't think you have one installed on your macOS — which macOS version it is BTW?)

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