420093 - Automatic proxy configuration URL bypasses localhost

Status: RESOLVED WONTFIX

(Core :: Networking, defect)

Description

[Patrick]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.12) Gecko/20080201 Firefox/2.0.0.12
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.12) Gecko/20080201 Firefox/2.0.0.12

When using the Automatic proxy configuration URL, there is no provision to bypass localhost (127.0.0.1) or any other IP address.  If you type 127.0.0.1 in the address bar, Firefox ignores it and goes directly to the proxy server.

Reproducible: Always

Steps to Reproduce:
1. Enter a URL in Tools->Options->Advanced->Network->Automatic proxy configuration URL
2. Type http://127.0.0.1 in the address bar
3. Firefox goes directly to Proxy server URL
Actual Results:  
Can't reach localhost

Expected Results:  
Connected to localhost - not proxy server

Comment 1

[Jo Hermans]

That depend on your PAC file (the proxy configuration file stored at that location). Your system administrator can write a PAC file that forces every access to pass thru the proxy server (including 127.0.0.1), if there's a reason for it. That's the whole point of the PAC file.

Comment 2

[Patrick]

You're assuming that I (or we, depending on the situation), can talk my (or our) ISP into altering/creating the PAC file.  Firefox allows the abilit to exclude IP addresses if you use a manual setting but this doesn't allow for the use of a URL.  Why not allow the same ability when using any other proxy setting?

Comment 3

[benc]

-> new.

Thats a perfectly valid reason, I've been waiting for someone to mention it :)

I think Safari has this hardcoded... but I'd need to double check.