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Thread: How-To: Disable IPV6 to speed up Internet.

  1. #1
    Join Date
    Oct 2005
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    Thumbs up How-To: Disable IPV6 to speed up Internet.

    Hello all,

    During today's Dapper development updates one of the packaes wanted to replace the /etc/modporbe.d/aliases file. Yes or No?
    Normally I would say No to keep my confuguration but it mentioned "to keep the developers additions". So I say, Yes replace it.

    I knew this was the file that would trun IPV6 back on and so I had to change it again after re-boot.
    Well, I guess I forgot how to do that (format wise) but after entering several forms I thot the net had sped up some but it was still stalling and slugish at the end of a web page load, as if it had to wait for a done signal.

    I thoht I would re-boot and see if there was a difference. Sure enough the network is responding a top speed now.

    So here are the changes I put in with the orginal comment out.
    But the re-boot is required.

    alias net-pf-10 ipv6 off
    alias net-pf-10 off
    alias ipv6 off
    #alias net-pf-10 ipv6

    IPV6 slows down the IPV4 environment if the router out the door does not understand IPV6 and for most people IPV6 is not needed.

    So, add the 3 lines, comment the orginal, save and re-boot.

    Firefox and Thunderbird will respond 3 to 4 times faster.


    SJ

  2. #2
    Join Date
    Nov 2004
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    Dapper Drake

    Re: How-To: Disable IPV6 to speed up Internet.

    wow... that sounds terrific. I will give it a try. Thanks!!

  3. #3
    Join Date
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    Edgy Eft Testing

    Re: How-To: Disable IPV6 to speed up Internet.

    Do I put those three lines at the end of the file or at the network protocols space? Please be more specific with these. You have to make sure all the noobs understand these instructions.

  4. #4
    Join Date
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    Re: How-To: Disable IPV6 to speed up Internet.

    Quote Originally Posted by SlowJet
    During today's Dapper development updates one of the packaes wanted to replace the /etc/modporbe.d/aliases file. Yes or No?
    I think that's the /etc/modprobe.d/aliases file.

  5. #5
    Join Date
    Oct 2005
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    39

    Re: How-To: Disable IPV6 to speed up Internet.

    Sorry about the sloppy post.

    cd /etc/modprobe.d
    darwinhwebb@Celcila-24:/etc/modprobe.d$ dir
    aliases alsa-base blacklist isapnp
    aliases~ arch bluez nvidia-kernel-nkc
    aliases.dpkg-old arch-aliases ibm_acpi.modprobe toshiba_acpi.modprobe
    darwinhwebb@Celcila-24:/etc/modprobe.d$ cat aliases
    # These are the standard aliases for devices and kernel drivers.
    # This file does not need to be modified.
    #
    # Please file a bug against module-init-tools if a package needs a entry
    # in this file.

    # network protocols ################################################## ########
    alias net-pf-1 unix
    alias net-pf-2 ipv4
    alias net-pf-3 ax25
    alias net-pf-4 ipx
    alias net-pf-5 appletalk
    alias net-pf-6 netrom
    alias net-pf-7 bridge
    alias net-pf-8 atm
    alias net-pf-9 x25
    # 1, 2, 3 new lines
    alias net-pf-10 ipv6 off
    alias net-pf-10 off
    alias ivp6 off
    #alias net-pf-10 ivp6 =========the original line
    alias net-pf-11 rose
    alias net-pf-12 decnet
    # 13 NETBEUI
    alias net-pf-15 af_key
    alias net-pf-16 af_netlink
    alias net-pf-17 af_packet

  6. #6
    Join Date
    Oct 2004
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    Moscow, Russia
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    Ubuntu Breezy 5.10

    Lightbulb Re: How-To: Disable IPV6 to speed up Internet.

    There's an easy way: instead of changing aliases file, create fie named bad_list in /etc/modprobe.d containing this line:
    Code:
    alias net-pf-10 off
    Now reboot and voila, no IPv6 on your system!

    This method will work even if /etc/modprobe.d/aliases get replaced at some update.

  7. #7
    Join Date
    Apr 2005
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    New York, NY
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    152
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    Ubuntu 11.10 Oneiric Ocelot

    Re: How-To: Disable IPV6 to speed up Internet.

    Quote Originally Posted by mhael
    There's an easy way: instead of changing aliases file, create fie named bad_list in /etc/modprobe.d containing this line:
    Code:
    alias net-pf-10 off
    Now reboot and voila, no IPv6 on your system!

    This method will work even if /etc/modprobe.d/aliases get replaced at some update.
    If we do this, do we have to do any of the steps above? I'm a bit confused...

    Also, how would we check to see if IPv6 is enabled or disabled?

  8. #8
    Join Date
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    Re: How-To: Disable IPV6 to speed up Internet.

    From the ubuntu-devel mailing list (culled from a variety of posts)
    Quote Originally Posted by ubuntu-devel list
    Having IPv6 be the cause of 'slow' connection is actually a common
    misconception, reinforced in that disabling some IPv6 features may help
    mitigate the problem, in most cases it is the result of bad network
    configuration.

    IPv6 itself does not in any way slow down your connection, problems will
    arise however if you have a route out to the IPv6 internet but it is not
    operational, as the browser will try to connect and it will take a while
    to time-out, note this would also happen with a bad IPv4 internet
    connection.

    Another cause in the past has been bugs in programs (e.g. mozilla) that
    do the wrong thing internally, most of the major problems here have been
    fixed.

    As above, these issues would *only* happen if the website you are trying
    to connect to has an IPv6 address associated. Another cause can be
    having an IPv6 name-server configured in resolv.conf or similar, in
    which case the problem would arise if you were trying to connect to
    *any* address.


    Most people do not have a problem with having IPv6 enabled, it
    simply is un-used when not in use.

    If you are having problems, it is likely due to some kind of
    misconfiguration, you would need to diagnose that.

    In particular, the commands 'ip -6 route' may help, it will indicate if
    you have any routes to the broader IPv6 world (look for '2000::/3' and
    'default' routes). THis may be caused by an incorrect router on your
    network, or by using tunneling software (such as tspc from
    freenet6.net), or a number of other reasons.

    In simpler terms: with a default Ubuntu install, if you're not using
    IPv6, you shouldn't even know it's there. If you're experiencing
    negative side effects, they're likely the result of a broken application
    or incorrect configuration. Firefox, for instance, is a known culprit.

    One thing you can try is, with IPv6 enabled, to launch a terminal, and
    type 'host www.google.com'. If the command succeeds quickly, listing
    Google's IPs, then you're not having general network connectivity
    trouble, and you can start filing bug reports against whichever specific
    applications are being slow.
    My suggestion to all those with "slow" internet. Try the last paragraph especially, then start filling bug reports.

  9. #9
    Join Date
    Oct 2004
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    Moscow, Russia
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    Ubuntu Breezy 5.10

    Re: How-To: Disable IPV6 to speed up Internet.

    Quote Originally Posted by sailor420
    If we do this, do we have to do any of the steps above? I'm a bit confused...

    Also, how would we check to see if IPv6 is enabled or disabled?
    No, all you need is to create /etc/modprobe.d/bad_list with specified line and reboot.

    To check IPv6 state open terminal and execute:
    Code:
    ip a | grep inet6
    If this command shows some lines - IPv6 is enabled. If output is empty - IPv6 disabled.

  10. #10
    Join Date
    Sep 2005
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    Italy
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    Ubuntu 7.10 Gutsy Gibbon

    Red face Re: How-To: Disable IPV6 to speed up Internet.

    sorry for the silly question (but man page isn't so clear to me)
    why there's ipv6 if you should disable?

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