1. Proxy Pac Url File

I've got a machine here that's running a website. It's only really a development machine but it has IIS on it for testing purposes. Problem is that when pages get loaded in internet explorer using the machines name, the request is going out to the proxy server which is coming back with an error:The requested URL could not beretrievedWhile trying to retrieve the URL:The following error was encountered:Unable to determine IP address fromhost name for seed-dev1.hull.ac.ukThe dnsserver returned:Name Error: The domain name does notexist. This means that:The cache was not able to resolve thehostname presented in the URL. Checkif the address is correct.

Its all blank. I've read that with IE11, if you use the advanced tab, it then removes all proxy settings. If I send proxy details out via GP and don't add any proxy bypass addresses, it works fine - however, I do need to bypass the proxy, as this is also causing intermittent outlook connection issues (using symantec squid).

Your cacheadministrator is webmaster.Generated Thu, 04 Jun 2009 16:18:33GMT by slb-webcache-east.hull.ac.uk(squid/2.6.STABLE22)The error makes sense as the machine is really seed-dev1.net.dcs.hull.ac.uk. Regardless, I don't want it to be going off to the proxy server for local addresses. Let's try the easy ones first:(In Internet Explorer; and I'm assuming you're using IE because you're running IIS on 127.0.0.1 and you reference the hosts file in driversetc.)1.) Navigate to 'tools', 'internet options', 'connections', 'LANSettings'.2.) Make sure, 'Bypass proxy server for all local addresses' is selected.Now, hmm. Assuming you're running an internal DNS server/private IP addresses:3.) In a command-prompt, run: 'ipconfig /registerdns'4.) Ensure that you can forward and reverse ping your machinename w/ it'sinternal IP address.5.) If 'localhost' isn't working, try pinging localhost at the commandprompt, it's resolving to 127.0.0.1,yeah?Let's clean up that hosts file:5.) Make sure your hosts file wasn't inadvertently saved with a '.txt'extention. If so, remove it.6.) In your LAN/adapter settings, make sure that you don't have any DNSsuffixes to be appended.Curious to see if any of those fixed the problem. Check your IE Zones - I've seen it happen at times that IE would place a local server in the Internet zone, thus causing it to ignore the 'bypass proxy' setting.

Haven't figured out the reason why yet, but it does appear related to either a non-standard port or the server not being a member of the same Windows Domain as the client. To be honest, this is not something I've spent too much time researching; once I found a solution I moved on.You should be able to explicitly add this server to your Intranet zone and thus trigger the proxy bypass; otherwise you will need to explicitly add the FQDN of the server to your 'bypass proxy' list. In the early days of IE, a local server was defined to be 'a server without periods in the name'. In your example ' would be local and ' would be remote and sent to the proxy server.In the IE Internet Options dialog, click on the Advanced button next to the port number text box for the proxy setting. You should see a text box at the bottom of this new dialog box that allows for exceptions. Try entering seed-dev1.hull.ac.uk in that box and clicking the OK buttons until you get back to the main IE window.thanks,mark.

This will happen if your proxy exception list is injected manually through the registry and is missing a; semicolon after the last value. The reason is that the registry stores the checkbox at the end of the registry exception string as and this is never properly parsed if the last semicolon is missing.The registry key for an individual user can be viewed here: HKEYCURRENTUSERSoftwareMicrosoftWindowsCurrentVersionInternet Settings. Or for environments that set this computer-wide: HKEYLOCALMACHINESOFTWAREMicrosoftWindowsCurrentVersionInternetSettingsThis is most likely a bug with IE11, but one in which they're unlikely to fix. When adding exceptions manually, the UI will insert this semicolon silently.Other symptoms that may occur are. Websites like may incorrect get a.com suffix appended or display 404 Page not Found (depending on the proxy software).

Some pages and redirects will stop functioning and you may even find yourself un-clicking 'Enable Protected Mode', but it's not that. It's the semicolon.If this started happening in 2018, it may be triggered by a Windows update, although it's impossible to know without the source code or consulting Microsoft.

Here's the Windows update text from July 2018 that reads as a possible culprit.July 10, 2018—KB4338818 (Monthly Rollup)Addresses an issue where DNS requests disregard proxy configurations in Internet Explorer and Microsoft Edge.

I was looking for a place to submit suggestions for improvements, but didn't find any, so hopefully here will do.I'm working for a multinational company with dozens of local intranets. Of course there's a proxy server to access the Internet as well, so the connection configuration calls for a manual proxy configuration, with a list of (internal) sites for which no proxy is necessary.

Problem is, there are so many intranets with different names that listing all of them in the exceptions list would be quite tedious. I also tried the automatic proxy parameter detection but it doesn't work.I hate to say that, but IE does it better. There's a checkbox requesting to not use a proxy server for all local addresses. In one swoop the entire company is covered. That would be much simpler to have that in Firefox as well.

Proxy Pac Url File

Is anybody listening?JL. Bug 72444 - Proxy: 'bypass proxy server for local addresses' (IE pref)An old bug. The suggested workarounds are to use IP ranges in the no-proxy-for field (but this suggestion is hampered by bug 136789), or to create a PAC file to check if addresses match a predictable pattern.