Ubuntu does not honor “ignore-hosts” proxy settings for IPv6

[Thiago Martins]

I just typed under "dconf-editor", System → Proxy → ignore-hosts, the following content:

['localhost', '127.0.0.0/8', '::1', '192.168.0.1', '2000::/3', 'fc00::/8']

But, Google Chrome (and apt-get update / upgrade) is just ignoring this settings.

Also, Firefox doesn't honor the `ingore-hosts` settings, even configuring it to "Use system proxy settings".

For example, my Proxy Server (Ubuntu with Squid3) is in dual-stacked mode BUT, I do NOT want to access IPv6 web sites through the Proxy, that's why I'm trying to ignore the entire IPv6 Internet with the entry 2000::/3 above, but, it does not work as expected.

BTW, I don't need the proxy to access Hyperboria sites, which resides under fc00::/8 (local / private subnet) but, it doesn't work either...

Why I'm doing this?

Because my environment is already a IPv6-Only Network and, to access the old internet infrastructure (IPv4-Only), I need to go through the dual-stacked proxy. But I need the proxy only when a web site doesn't have IPv6...

How can I know that it doesn't work?!

It is simple, just access a web site that shows a IPv6 address on it, for example, http://www.sixxs.net or http://ipv6.whatismyv6.com, then, I'm still seeing the IPv6 address of the Proxy Server, so, "ignore-hosts entry '2000::/3'" doesn't seem to be working.

Plus, when I'm trying to access a Hyperboria website, Squid returns an error that it can not reach `fc00::/8` network

(Squid ERROR: (101) Network is unreachable)

...of course it can't, the cjdns router is running right on my Ubuntu Desktop, so, no need to go through proxy when browsing Hyperboria fc00::/8 but, Ubuntu isn't honoring ignore-hosts under proxy settings.

Please guys, Linux is a O.S. built for networks! How can "Ubuntu Proxy Setup" be so simplistic?! And it doesn't even work!

I already tried askubuntu.com but, no answer there, look: http://askubuntu.com/questions/435163/how-to-make-ubuntu-honor-ignore-hosts-proxy-settings-for-ipv6

I really appreciate any help! This is a serious problem.

Thanks!
Thiago

[Thiago Martins (martinx)]

Oh! I'm already using Ubuntu 14.04.... Sorry to not mention it above.

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1295003/+editstatus and add the package name in the text box next to the word Package.

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[Thiago Martins (martinx)]

Søren,

I don't think this is a "d-conf" fault... Since it is writing the configuration... The problem, apparently, is with the Ubuntu itself, that is ignoring that configuration, so, this affects the "distro" as a whole.

Ubuntu NEEDs a much better Proxy Settings under "System Settings" => "Network" => "Network Proxy". Even Windows XP have a better Proxy configuration than Trusty, this is a shame for us... :'(

Don't you think?!

Cheers!
Thiago