Firefox always asks for a username/password from a proxy for any website I try to visit. "No proxy" is selected.
Firefox is installed on my work computer (v16 on windows XP). When I go to any unsecure website, I get a request for a username and password from a proxy. I don't have one, so I press "cancel." I get the following message (I put the asterisks in):
"This Page Cannot Be Displayed
Authentication is required to access the requested web site ( *******-webproxy ). A valid user ID and password must be entered when prompted.
If you have questions, need assistance with your login information, or feel this is an error, please contact your corporate network administrator and provide the codes shown below. Notification codes: (1, WWW_AUTH_REQUIRED, *********-webproxy)"
The website in the address bar is: http://*******-webproxy/B0000D0000N0001F0000S0002R0004/http://www.whatever.com/
This started after it upgraded (to which version, I don't remember). I also had another version of firefox installed to my "Local Settings" directory since I can't (un)install programs on the computer. That one was working fine until I upgraded to v.15 or v.16 (or maybe 14... I don't remember), and then I started getting the warning screen for an untrusted connection whenever I went to a secure website (https), I had to confirm a security exception, etc. And even then some pages only appeared as text.
I uninstalled that version, and then installed 17b4, and I'm back to the same problem as the original firefox: unsecure websites always seem to be redirecting through a proxy, and secure ones always tell me the connection is untrusted and I have to confirm an exception. I have "No proxy" selected in the network options. I tried v16 with the same results.
I would love to be able to just go to a website and not have to confirm security exceptions or get web proxy errors.
Internet Explorer works fine, btw.
Modified by Daniel
All Replies (8)
Not sure from your example but it appears that the address doesn't have a full domain, i.e., the part between http:// and the next / is not a valid internet domain name, e.g.,
http://sometext-webproxy/
In that case, it's probably something running on your computer, either as part of your security software, or as a Firefox add-on, or malware.
A standard diagnostic to bypass interference by extensions (and some custom settings) is to try Firefox's Safe Mode.
First, I recommend backing up your Firefox settings in case something goes wrong. See Back up and restore information in Firefox profiles. (You can copy your entire Firefox profile folder somewhere outside of the Mozilla folder.)
Next, restart Firefox in Firefox's Safe Mode (Diagnose Firefox issues using Troubleshoot Mode) using
Help > Restart with Add-ons Disabled
In the dialog, click "Start in Safe Mode."
If you can access sites normally, this points to one of your extensions or custom settings as the problem.
To also disable plugins, you can try here:
orange Firefox button or classic Tools menu > Add-ons > Plugins category
Any change?
Sorry, just realized you are on a work network. You may want to check with IT on whether this is a proxy server they run and, if so, whether you can save your authentication credentials in Firefox the way IE appears to have saved them.
Unfortunately, IT was out yesterday and today, but why would upgrading Firefox cause this issue? Also, do you know if there's anything I can do about the "untrusted connections" or if that's related to the other problem?
At this point, I don't know what software/process/add-on is proxying your connection, so I could only guess (probably mistakenly) about why it changed.
Could you try the Safe Mode test to see whether it is internal to Firefox or external to Firefox?
Exact same thing when I try safe mode.
You can also try this:
Thank you for the help, but it's actually a different issue.
Let's try to determine the location of the proxy server. If you open a command window and use nslookup, do you get an internal address (e.g., someserver.company.local) or a loopback address (e.g., 127.0.0.x), or an external address?
Start > search box: cmd.exe {ENTER}
nslookup hostname
If you get an internal address on your LAN, have you tried entering your Windows login credentials? There's a risk to doing that with an unknown server, but if you are confident it's an internal server, that may be a risk worth taking.
If your Windows credentials work, you can authorize Firefox to pass them to that particular server automatically like IE does. This article has the steps: Firefox asks for user name and password on internal sites.