How-To: Disable IPV6 to speed up Internet.

[bokibre]

i have same problem, with dapper and after readind all stuff i tried following steps:-
1) disabled ipv6 in mozilla
2) changed /etc/modprobe.d/aliases
3) creating badlist file.
4) creating blacklist-ipv6 file.

now i dont get any modules loaded by
ip a | grep inet6
or
lsmod | grep ipv6

after all this i am able to use mozilla. but still unable to connect using synaptic or gaim etc..
can anyone plzz help me for fixing this problem?
also plzz answer on following post:-
http://www.ubuntuforums.org/showthread.php?t=225734

thanks and regards

I have the same problem firefox is working just fine but synaptic won't reload nor update is working, I can't download anything of things are listed!!! What's with that?!?!?! IPV6 again or samething completely different?!?!?!?

HEEELLLLPPP!!!

oh and thanks for this that is working!

[wilberfan]

Holy crap...

HUGE difference! The only thing that worked for me (Dapper), was editing the aliases file.

[ign]

1. Open a Terminal Window
2. Type sudo gedit /etc/modprobe.d/bad_list/
3. In the gedit window, type: alias net-pf-10 off
4. Save the file and reboot.

This saved my life, thank you!!!
i run Dapper, Firefox was painfully slow, but this has made an amazing change in the speed and response.

[redjediuk]

Thanks, ipv6 doesn't like certain D-Link hardware, including my router
This little nugget solved the lot!

Hi,

I made this change to Dapper...

"1. Open a Terminal Window
2. Type sudo gedit /etc/modprobe.d/bad_list/
3. In the gedit window, type: alias net-pf-10 off
4. Save the file and reboot."

...and all was fine and I could resolve DNS with Firefox etc.

However..

I've just installed Edgy Eft and completed the same fix and it doesn't work. I checked the Networking and the Link is fixed to the IPV6 settings and not the IPV4.

How can I turn off / remove IPV6 from Edgy Eft?

Many thanks

Jedi

[handy]

Hi,

I made this change to Dapper...

"1. Open a Terminal Window
2. Type sudo gedit /etc/modprobe.d/bad_list/
3. In the gedit window, type: alias net-pf-10 off
4. Save the file and reboot."

...and all was fine and I could resolve DNS with Firefox etc.

However..

I've just installed Edgy Eft and completed the same fix and it doesn't work. I checked the Networking and the Link is fixed to the IPV6 settings and not the IPV4.

How can I turn off / remove IPV6 from Edgy Eft?

Many thanks

Jedi

I have to do it in Firefox or I can't even browse the web!

It's in the middle of this short How-To.

I hope it works for you too?

[Edit:] I just had a quick look at the last 3 or 4 pages, the about:config thing for Firefox is in there already.

[phormion]

For those who want to look a bit deeper into the problem, here's document that's 'a bit' more informative:

http://v6fix.net/docs/wide-draft-v6fix.en

What this document implies is that most problems are caused by two things:

a) apps which perform AAAA queries (for IPv6 addresses) even if IPv6 connectivity is not available
b) inappropriate handling of dual-stack setups in operating systems (like the 'on link assumption');

So, some DNS AAAA lookups that used to fail now succeed, as people get IPv6 connectivity, but sometimes it's not a good idea to use those addresses. The second thing is - the problem is related both to bugs in applications and operating systems (the document implies that at least the 'on link assumption' was fixed in kernel 2.6.9, but that's one of the problems).

What's in a way disturbing is that after reading that document it's obvious the guy who posted that message on the ubuntu-devel mailing list didn't know too well what he was talking about. Suggesting 'host www.google.com' as a way to diagnose connectivity is hilarious - this only checks your DNS resolution, nothing more.

[compwiz18]

adding ipv6 to the modprobe blacklist did it for me

so simply add ipv6 to the end of /etc/modprobe.d/blacklist, and that takes care of it.

[redjediuk]

adding ipv6 to the modprobe blacklist did it for me

so simply add ipv6 to the end of /etc/modprobe.d/blacklist, and that takes care of it.

Apologies but I'm a complete newbie to Linux so please could you show me the syntax of the file so I can replicate it.

Many thanks

Jedi

[compwiz18]

Apologies but I'm a complete newbie to Linux so please could you show me the syntax of the file so I can replicate it.

Many thanks

Jedi

The easy way is to just run this command:

sudo echo "ipv6" >> /etc/modprobe.d/blacklist

that should fix it up.

[ddtrust]

In Dapper I got to disable ipv6 in this way: Make a file called 'blacklist-ipv6' in /etc/modprobe.d/ and inside the file put this text: blacklist ipv6

So the next time you boot, the ipv6 module won't be loaded (lsmod | grep ipv6 ; it's a better way to check ipv6 presence than 'ip a | grep inet6', I think, since the module manages the thing).

Thanks for this. I think that's the way to go with 6.06 Dapper. At least it worked for me. And if you ever want to enable ipv6 again, all you have to do is to delete the file (sudo rm /etc/modprobe.d/blacklist-ipv6) and reboot to make it work again. Am I right?