197968 - Proxy: cannot turn off domain guessing

Status: RESOLVED DUPLICATE of bug 193988

(Core :: Networking, defect)

Description

[Tom Winterhalder]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.3) Gecko/20030312
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.3) Gecko/20030312

In the office I'm using mozilla as my default browser.
When I'use our proxy, mozilla always adds www. and .com on local machines (e.g
local-intranet). When I turn off the proxy it doesn't show the same behaviour.
I have no automatic proxy-script. The proxy is set manually.

Reproducible: Always

Steps to Reproduce:
1. use proxy
2. type in a local machine with webserver 
3. check the result

Actual Results:  
I received an unresolved hostname error as the www.mymachine.com does not exist.

Expected Results:  
I would like to have the page mymachine opened.

When turning off proxy settings the name completion is turned off as expected.
Turning off proxy is not a suitable workaround for me. Also the workaround with
the download and changing of the automatic configuration script is not applicable.

Comment 1

[James Graham]

Umm does Edit - Preferences - Smart Browsing - Domain Guessing do what you want?

Comment 2

[Tom Winterhalder]

It would do, if it works. 


Behind our proxy I can disable this option, what I already did, but nothing 
changes. It always adds www and com, even if it is disabled.

Comment 3

[Jo Hermans]

Isn't it your proxy-server that is doing that lookup ? Maybe it has a 'search'
entry in its /etc/resolv.conf file.

Comment 4

[Matthias Versen [:Matti]]

Do you get the same result with other browsers ?

Comment 5

[Tom Winterhalder]

Other browsers like Opera 7.03 (Build 2670) and Internet Explorer 6.0.2600.000 
don't show the same behaviour. It's just Mozilla and Phoenix 0.5 (Mozilla/5.0 
(X11; U; Linux i686; en-US; rv:1.3a) Gecko/20021207 Phoenix/0.5) which is 
running on a Linux box.


Probably there are other gecko based browsers which show the same behaviour but  
I don't have installed any of these.

Comment 6

[benc]

I think there is a dupe someone had this problem recently and it should have
been marked invalid... but I can't find it. 

Here's the likely cause... the proxy implements domain guessing too!

see the analysis in-> http://bugzilla.mozilla.org/show_bug.cgi?id=91587#c8

w/o proxy, turning off domain guessing would change the error from:

"www.mymachine.com" to "mymachine" this would appear in an error alert.

w/ proxy, you should get an error message that appears in your window (becuase
the proxy returns html error pages).

Comment 7

[benc]

RESOLVE/DUPE:
I don't know why the behavior is different for other browsers, but the
troubleshooting isolates the problem to the proxy.

*** This bug has been marked as a duplicate of 193988 ***