-----Original message-----
From:	Andreas Mock <[log in to unmask]>
Sent:	Wed 05-08-2015 19:00
Subject:	IPv6 address popping up
To:	[log in to unmask]; 
> Hi all,
> 
> I hope anybody out there can give me the right hint for a problem
> I have on a server with SL 6.6 64 bit.
> 
> I want to have IPv6 totally disabled. Therefore I did the following
> found on the net:
> 
> /etc/sysctl.conf  :  net.ipv6.conf.all.disable_ipv6 = 1
> /etc/sysconfig/network  : NETWORKING_IPV6=no
> /etc/sysconfig/network-scripts/ifcfg-eth0 : IPV6INIT=no (and other ifcfg)
> iptables6 disabled 
> in /etc/modprobe.d/ipv6.conf with:
> alias net-pf-10 off
> alias ipv6 off
> 
> After reboot all seems ok. No IPv6 address shown with 'ip addr show'.
> 
> BUT: After some time (hours, days, I don't know), when I look at
> the ip addresses I can suddenly see that there is a IPv6 address.
> A 'cat /proc/sys/net/ipv6/conf/all/disable_ipv6' shows 1 in that
> case. Kernel modules are loaded.
> 
> Can anyone give me a hint or explanation why IPv6 is suddenly popping up?
> Is there any code/process out there pulling the IPv6 modules into the
> kernel?
> 
> Best regards
> Andreas
> 
> 

Also in /etc/sysctl.conf
net.ipv6.conf.default.disable_ipv6 = 1

Cheers
Bill Maidment
www.maidment.me
Phone: 02 4472 9374