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