How to disable ipv6 on wlan, on current?[SOLVED]

camerabambai · 07-30-2019, 07:16 AM

I have this network configuration
Network manager with wireless.
I have a really high cpu use on firefox(sometime the entire system is "freezed" for a 10-11 seconds, and the command "w" report high load over 5.).
I'm tryng to solve this problem, I don't use ipv6, so I want to disable it.
I have edit this file

Code:

/etc/sysctl.d/40-ipv6.conf

Code:

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.wlan0.disable_ipv6 = 1

and this other

Code:

/etc/modprobe.d/blacklist.conf

blacklist ipv6

I reboot and ipv6 is active!

Code:

wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.43.170  netmask 255.255.255.0  broadcast 192.168.43.255
        inet6 *::*:*:*:*  prefixlen 64  scopeid 0x20<link>
        ether *:*:*:*:*:*  txqueuelen 1000  (Ethernet)
        RX packets 1206  bytes 411902 (402.2 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1158  bytes 195557 (190.9 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

why?

dc.901 · 07-30-2019, 07:29 AM

I do not use slackware, so this may be totally wrong...
In your ifcfg config, did you tried setting: IPV6INIT="no"
This is under /etc/sysconfig/network-scripts

camerabambai · 07-30-2019, 07:35 AM

Quote:

Originally Posted by dc.901

I do not use slackware, so this may be totally wrong...
In your ifcfg config, did you tried setting: IPV6INIT="no"
This is under /etc/sysconfig/network-scripts

This directory don't exist on Slackware, is a dir of Redhat, Fedora and other rpm based distro.

camerabambai · 07-30-2019, 07:43 AM

I see on reboot the file /proc/sys/net/ipv6/conf/all/disable_ipv6 is still on..0
I try to edit the /etc/sysctl.conf

Petri Kaukasoina · 07-30-2019, 08:04 AM

Quote:

Originally Posted by camerabambai

Code:

/etc/modprobe.d/blacklist.conf

blacklist ipv6

Code:

alias net-pf-10 off
alias ipv6 off

camerabambai · 07-30-2019, 08:19 AM

Solution found..a workaround.
I have to redo sysctl command on start

Code:

vim /etc/rc.d/rc.local

sysctl -w --system

camerabambai · 07-30-2019, 08:45 AM

Users with NetworkManager
Network manager enable ipv6 automatically, the solution is simple: edit connections and set ipv6 settings to "ignore".

baumei · 07-30-2019, 02:49 PM

Where IPv6 makes no sense to have running on the Slackware 14.2 computers which I tend, what I do to disable IPv6 is to put the following in /etc/rc.d/rc.local

Code:

# To entirely disable IPv6 in the kernel:
echo -n 1 > /proc/sys/net/ipv6/conf/all/disable_ipv6

Also, I ran the above on at least some instances of version 13.37 (I do not remember about other versions).

TheRealGrogan · 07-30-2019, 03:19 PM

I just disable it on the kernel command line (boot loader config).

ipv6.disable=1

I don't like having interfaces enabled that I'm not paying any attention to.

baumei · 07-30-2019, 03:42 PM

Quote:

Originally Posted by TheRealGrogan

I just disable it on the kernel command line (boot loader config).

ipv6.disable=1

Thanks! I like your method better than the one I figured out. :-)