567070 - Using network.proxy.socks_remote_dns=true breaks browser.fixup.alternate

Status: UNCONFIRMED

(Core :: Networking: Proxy, defect, P3)

Description

[Daniel Hahler]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 ( .NET CLR 3.5.30729) FirePHP/0.4
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 ( .NET CLR 3.5.30729) FirePHP/0.4

Enabling network.proxy.socks_remote_dns breaks browser.fixup.alternate:
Firefox does not try to fix up the domain name using the alternate prefix/suffix.

Also, in case of lookup failure there is no Firefox error page, only a blank page.

Reproducible: Always

Steps to Reproduce:
1. Setup a SOCKS (only) proxy, and enable network.proxy.socks_remote_dns (via about:config or FoxyProxy)
2. Access some site without DNS entry: http://foo.example.com/
Actual Results:  
Blank page.

Expected Results:  
Error page: "Firefox could not find the domain."

Also, www.foo.example.com should have been tried.

Comment 1

[Daniel Hahler]

This still happens with Minefield (as of today).

I am creating the SOCKS socket using "ssh -D 5555 remote.host", and when trying to access a non-accessible domain, the following gets dumped to the console where I've opened the ssh connection:
"channel 3: open failed: administratively prohibited: open failed"

Comment 2

[Daniel Hahler]

To reproduce it:
1. in a terminal: ssh -D 5555 remote.host
2. Setup Firefox to use the socks proxy (only, i.e. no HTTP proxy):
  network.proxy.socks;localhost
  network.proxy.socks_port;5555
  network.proxy.socks_remote_dns;true
  network.proxy.type;1
  network.proxy.http;
3. Access http://thisdoesnotexist.example.com/

Comment 3

[Firefox Bug Husbandry Bot]

Bulk change to priority: https://bugzilla.mozilla.org/show_bug.cgi?id=1399258

Comment 4

[Firefox Bug Husbandry Bot]

Bulk change to priority: https://bugzilla.mozilla.org/show_bug.cgi?id=1399258

Comment 5

[BMO Automation]

Moving bug to Core/Networking: Proxy.