From: kurt on
Hugh Janus wrote:
> Hi all,
> I have installed Fedora Core 6 and love it! However, I have 1 problem
> with is a pretty big one for me.
> I can use the internet fine with Konqueror, but with Firefox I get a
> timeout error. Also, when I run Add/Remove Programs, I get the error
> message "Cannot find a valid baseurl for repo: updates". It seems as
> if I have DNS problems, although konqueror lets me use the web fine.
> I have an ADSL connection with NAT running. My Windows XP machine
> works OK so I know it is not the router nor NAT. Also, the fact that
> Konqueror works with the internet suggests to me that this is a config
> problem. Any ideas? I have searched these groups but as of yet, I
> have not found a solution.
> TIA,
> Hugh
Had the same problem, I believe it happened after an update. In
/etc/yum.repos.d, when I edited the .repo files I found that the URLs
for even the standard repos had all been commented out. I just manually
un-commented them and everyting worked again.

Hope this helps,

From: Mark on
Hugh Janus wrote:

> Mark wrote:
>> > Hugh
>> First, test your DNS is working with the hostname for the fedora-updates
>> host in particular:
>> host
>> You should see:
>> has address
>> has address
>> has address
>> has address
>> Check your /etc/yum.repos.d/fedora-updates.repo to verify that
>> the "baseurl" entry is ok (not commented out with a "#", the
>> URL is valid --> test by pasting the baseurl into firefox and
>> visiting it, you should see a page listing a bunch of rpm files).
>> the baseurl in my fedora-updates.repo file is:
>> Mark
> All the above works OK. As I said, Firefox works sometimes but other
> times not. I even added all the mirrors to the local hosts file but
> this still did not make YUM work. I found a thread on google
> mentioning that it might be a problem with how Python resolves DNS
> names, however I don't see how this would affect Firefox (unless it is
> written in Python).
> When I had FC1 on the laptop I had no problems, but FC6 refuses to go.
> This is driving me nuts as it is the only thing not working! I am
> tempted to reinstall FC6 in case something got messed up during install
> but i'd prefer to fix it rather than just wipe and hope it solves
> itself.
> Any ideas?

The python thing would only explain yum's issues since yum is written
in python. What happens if you try one of the other browsers in FC6 like
Epiphany? Did you confirm your DNS is ok, like make sure the
/etc/resolv.conf has a valid "nameserver" entry in it?

It's possible Firefox is a bit more progressive in trying to use IPV6
than konqueror is, ie. it's trying IPv6 DNS calls, and you don't have
that setup so it timesout. Konqueror may only be trying IPv4 DNS which
works quickly. You can turn off ipv6 in firefox:

put about:config in the location bar to get to the config page, then
find this setting (a quick way is to put ipv6 in the Filter)

network.dns.disableIPv6 user set boolean false

right mouse button select that and use 'Toggle' to set that to 'true'

now retry your pages that failed and see if they work.
If you really like not having ipv6 support, you can totally turn it off via
doing this as root:

add these two lines to /etc/modprobe.conf
alias ipv6 off
alias net-pf-10 off

put this line (or change to no if it's there)
in /etc/sysconfig/network:

then run
/etc/init.d/ip6tables stop
/sbin/chkconfig ip6tables off
/etc/init.d/network restart

This is kind of a guess because usually the ipv6 timeout issue in
fedora usually has just made browsing really slow, it doesn't
usually cause a total failure in the page to load. What it usually
does it timeout on the IPv6 dns, then it falls back to use IPv4
DNS services.