Comment 6 for bug 663395

After doing some research, I finally found out that IPv6 is causing the huge delay in resolving url's.

IPv6 is enabled by default and apparently is the first IP protocol used for which to resolv url's.

Most people aren't using IPv6 yet, so attempting to resolv over IPv6 will result in a huge delay untill the system stops trying and falling back to IPv4.

This is the reason why the connections after waiting long enough will succeed.

Also, ping uses ipv4, that's why it works (ping6 being the ipv6 counterpart).

Now,

**************** WORKAROUND ****************
Disable IPv6 entirely

In a terminal, do this: cat /proc/sys/net/ipv6/conf/all/disable_ipv6
0 means IPv6 is enabled, we want it to become 1 (disabled) and make the change permanent.

Open up the following file like this: sudo gedit /etc/sysctl.conf
And add the following lines:

#Disable IPv6
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1

Now reboot the system, and connectivity should be snappy as expected.
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Although these settings have to do with the kernel configuration, I think that it's up to Network Manager to figure out if resolving through IPv6 is appropriate. So flaging this as a Network Manager Bug because IPv6 is being used even if it's flagged as "Ignore" under the connection settings.