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Old 04-30-2006, 04:06 PM   #1
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Registered: Apr 2006
Distribution: Fedora 4
Posts: 4

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Internet Speed fix for DNS lookup, Fedora 2-5, others

New distros like fedora 2-5 have Ipv6 turned on by default. IpV6 is a "new" DNS lookup that few servers use. This means that if the site you are trying to access in not listed on Ipv6, a 30 second timeout immeditately happens. It should be disabled. Also, Some other DNS servers miss the first few requests from linux machines. The default timeout is 5 seconds, so this could cause up to another 15 second delay. Step by step fix is as follows:
1. Log out of Fedora
2. Log in as root
3. enter your root password (the root password you entered when you installed fedora)
4. Click on "Home" or "My Computer"
5, Click on "Filesystem" or use up arrow to navigate to etc folder.
6. go to resolv.conf file. (not a folder, but a file located at the end of the files in your etc folder)
7. Insert this line at the bottom of the file: option timeout:1
8. Save the file
9. Go to etc/modprobe.conf file. Insert these lines at the bottom of the file:
alias ipv6 off
alias net-pf-10 off
10. Save the file.
11. Reboot your machine
12. Enjoy the SPEED!

There is an IPV6 summit planned for May if you live in Virginia. - check out the topics. May be they will solve the problem.

Registered Linux User: #415505
"It takes a little communication to have a misunderstanding."

Last edited by zzeepphhoo; 04-30-2006 at 04:47 PM.
Old 04-30-2006, 05:34 PM   #2
Registered: Oct 2004
Location: Small Town USA
Distribution: slamd64 2.6.12 Slackware 2.4.32 Windows XP x64 pro
Posts: 383

Rep: Reputation: 30
The docs for Fedora Core tells you this too. I haven't use FC since 2 but it was the same then.

Also no reason to reboot, use env-update && source /etc/profile as root.

Last edited by tormented_one; 04-30-2006 at 05:35 PM.


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