F19: ipv6disable=1 as boot-param ignored

[Cristian Sava]

On Mon, 2013-07-08 at 16:15 +0200, Reindl Harald wrote:
> 
> Am 08.07.2013 15:56, schrieb Cristian Sava:
> > On Sun, 2013-07-07 at 18:18 +0200, Reindl Harald wrote:
> >> "ipv6disable=1" in F19 is ignored
> >>
> >> i get tired every few months research how IPv6 to disable
> >> because it permanently changes, maybe it is F19/systemd
> >> maybe it is the F20 3.10.0-1.fc20.x86_64 because it is
> >> the only 3.10 build currently, however the kernel-line
> >> is clear
> >>
> >> on pure ipv4 networks there is no need for
> >> "inet6 fe80::20c:29ff:fe30:82b9" period
> >>
> >> eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
> >>         inet 192.168.196.18  netmask 255.255.255.0  broadcast 192.168.196.255
> >>         inet6 fe80::20c:29ff:fe30:82b9  prefixlen 64  scopeid 0x20<link>
> >>         ether 00:0c:29:30:82:b9  txqueuelen 1000  (Ethernet)
> >>         RX packets 755  bytes 71786 (70.1 KiB)
> >>         RX errors 0  dropped 0  overruns 0  frame 0
> >>         TX packets 594  bytes 162204 (158.4 KiB)
> >>         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
> >>
> > Do you mind to disable IPV6 in ifcfg-eth0 (comment out IPV6_...)? You
> > will probably lose your default (ipv4) route!
> > You're not alone.
> 
> this has notthing to do with ifcfg-files
> there is "IPV6INIT=no" since many years on my machines
> 
> "ipv6disable=1" is for disable the *entire* ipv6 stack
> and a good admin disableds *anything* which is not
> in use for security reasons - i have ip4-rules on servers
> which are even block 127.0.0.1 for Samba while it is
> allowed from specific LAN IP's but not from php-scripts
> __________________
> 
> syslog message at boot:
> ipv6: Loaded, but administratively disabled, reboot required to enable
> 
> this does currently no longer work and every release
> the magic how to achive this is randomly changed
> from sysctl to kernel-params, different params or
> modprobe-aliases a few years before
> 
> 
> 
I wanted to say that if IPV6=no (does not matter where or how) many
things will go wrong.
Some bugs are present in the networking and I was hit by some of them.
Hope they will be fixed soon.

C. Sava