Where does default ipv6 address come from and how can I remove ipv6?

Posted: 02-16-2006, 02:27 AM

Brian Whiting

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In checking my packet output via ethereal I find that I'm getting lots of
irrelevant ipv6 dns queries coming from my pc. The queries are
automatically appending my home domain, wns.com, even though I removed all
references to that domain I can find in MCC. The ipv4 dns queries work
fine. Here are the contents of my /etc/sysconfig/network file:
HOSTNAME=pavilion
NETWORKING=yes
NETWORKING_IPV6=no

I restarted the network but I still get v6 IP address assigned along with my
v4 address. According to the ifup-ipv6 script it checks for
NETWORKING_IPV6=yes before it brings up the interface for v6. Where is my
interface getting its address and how can I stop it?

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Responses to "Where does default ipv6 address come from and how can I remove ipv6?"

De Kameel

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Re: Where does default ipv6 address come from and how can I removeipv6?

Posted: 02-16-2006, 07:23 AM

Brian Whiting wrote:

> In checking my packet output via ethereal I find that I'm getting lots of
> irrelevant ipv6 dns queries coming from my pc. The queries are
> automatically appending my home domain, wns.com, even though I removed all
> references to that domain I can find in MCC. The ipv4 dns queries work
> fine. Here are the contents of my /etc/sysconfig/network file:
> HOSTNAME=pavilion
> NETWORKING=yes
> NETWORKING_IPV6=no
>
> I restarted the network but I still get v6 IP address assigned along with my
> v4 address. According to the ifup-ipv6 script it checks for
> NETWORKING_IPV6=yes before it brings up the interface for v6. Where is my
> interface getting its address and how can I stop it?

You mean the local addresses fe80:<something>? They are auto-assigned
after loading the module 'ipv6'

[root@hp ~]# lsmod | grep -i ipv6
ipv6 234016 16
[root@hp ~]#

So if you don't want those addresses (why?), make sure the module ipv6
is not loaded.

de Kameel

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Brian Whiting

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Re: Where does default ipv6 address come from and how can I remove ipv6?

Posted: 02-16-2006, 01:38 PM

De Kameel wrote:

> Brian Whiting wrote:
>> In checking my packet output via ethereal I find that I'm getting lots of
>> irrelevant ipv6 dns queries coming from my pc. The queries are
>> automatically appending my home domain, wns.com, even though I removed
>> all references to that domain I can find in MCC.

>> <snip>

> [root@hp ~]# lsmod | grep -i ipv6
> ipv6 234016 16
> [root@hp ~]#
>
> So if you don't want those addresses (why?), make sure the module ipv6
> is not loaded.

lsmod returns nothing for ipv6 and the v6 address is no longer being
assigned since I rebooted the machine. I am still getting AAAA dns queries
with wns.com appended to the query target though. I recursively grepped
all files inside /etc and wns.com is not anywhere there. I'll post this as
a new question since ipv6 addressing appears to be taken care of.

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