Take the 2-minute tour ×  After very long time using Ubuntu old
LTS version I have re-installed to new LTS 12.10, but I can't
get rid of ipv6 !  I have did:  in
/etc/modprobe.d/blacklist.conf:  blacklist ipv6 blacklist
ip6table_filter blacklist ip6_tables  in /etc/sysctl.conf
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1  But ufw happily use v6
protocol, and in dmesg:  ip6_tables: (C) 2000-2006 Netfilter
Core Team . . IPv6: ADDRCONF(NETDEV_CHANGE): em1: link becomes
ready  What is going to take to get rid of IPv6 ? I swear
Terminator didn't put so much fight.  share|improve this
question  2 Answers 2  If you really want to disable IPv6, which
I think is a bad idea, you need to tell all programs that use
the net not to use IPv6. In UFW you have to edit
/etc/defaults/ufw and check that IPv6 are not enabled there. But
really, I think that's a bad idea.  share|improve this answer
Why would it be bad idea ? I do not use IPv6 at all, so why
bother kerne