1.  IPv6-ready kernel Modern Linux distributions already contain IPv6-ready kernels, the IPv6 capability is generally compiled as a module, but it's possible that this module is not loaded automatically on startup. Note: you shouldn't anymore use kernel series 2.2.x, because it's not IPv6-up-to-date anymore.

Create a file ipv6.conf under modprobe.d and disable the service persistently and reboot the server to take effect. # echo "options ipv6 disable=1" > /etc/modprobe.d/ipv6.conf # chkconfig ip6tables off # reboot. Once module disabled take a reboot. Method 2: Disable using "sysctl" and reboot. Edit the sysctl.conf and append with two lines. Dec 04, 2012 · Disabling IPv6 support in Red Hat Enterprise Linux 5 Remove the following line (if present) from the /etc/modprobe.conf file: alias net-pf-10 ipv6 Add the following line to the /etc/modprobe.conf file: alias net-pf-10 off In versions of Red Hat Enterprise Linux before 5.4, add the following line to the /etc/modprobe.conf file: alias ipv6 off Create /etc/modprobe.d/ipv6.conf if not already present with below parameter: options ipv6 disable=1. 3. Disable ipt6tables service # chkconfig ip6tables off. 4 Jul 05, 2016 · IPv6 module is already built-in to kernel, no need to use modprobe ipv6 command on Ubuntu 10 anymore (probably since version 9) JP says: January 21, 2011 at 6:59 am .

IPv6¶. Options for the ipv6 module are supplied as parameters at load time. Module options may be given as command line arguments to the insmod or modprobe command, but are usually specified in either /etc/modules.d/*.conf configuration files, or in a distro-specific configuration file. The available ipv6 module parameters are listed below.

Why is my CentOS 6 system doing IPv6 lookups? - Unix net.ipv6.conf.default.disable_ipv6 = 1 in /etcsysctl.conf However when I do DNS lookups, most notably for yum updates, I keep getting offered IPv6 addresses, which of course are not reachable; I presume from this that my system is asking for AAAA records instead of A records when doing a name lookup. CentOS7でIPv6を完全に無効化する方法。 - Qiita

IPv6 カーネルパラメーターを変更するとエラーが表示されるのはなぜですか? # sysctl -p error: "net.ipv6.conf.default.accept_redirects" is an unknown key error: "net.ipv6.conf.default.accept_ra" is an unknown key error: "net.ipv6.conf.all.disable_ipv6" is an unknown key error: "net.ipv6.conf.default.disable_ipv6" is

(Re)move /etc/modprobe.conf, if present, as it supersedes anything in /etc/modprobe.d/* (unless you add include /etc/modprobe.d). The modules listed in /etc/initramfs-tools/modules aren't subject to blacklists so comment it first. Oct 11, 2010 · These entries in /etc/sysconfig/network : IPV6INIT=NO NETWORKING_IPV6=NO 4. This line is added to /etc/modprobe.d/blaclist : blacklist ipv6 5. Also I did one more in /etc/sysctl.conf : 6. `net.ipv6.conf.all.autoconf = 0` 7. `net.ipv6.conf.accept_ra = 0` Still I am unable to disable IPV6 on linux, any thought please Help Appreciated Dec 09, 2019 · For CentOS 5.3 or older, add the following to /etc/modprobe.conf : alias ipv6 off alias net-pf-10 off Run /sbin/chkconfig ip6tables off to disable the IPv6 firewall May 12, 2008 · To completely disable IPv6 in your system, all you have to do is save the following line in a file inside /etc/modprobe.d/. install ipv6 /bin/true The above line means: whenever the system needs to load the ipv6 kernel module, it is forced to execute the command true instead of actually loading the module. The IPV6_AUTOCONF config variable controls whether any Router Advertisements should be received, as a side effect this also disables the autoconfigured IPv6 address as the autoconfig process is based on the advertised network prefix. IPv6 カーネルパラメーターを変更するとエラーが表示されるのはなぜですか? # sysctl -p error: "net.ipv6.conf.default.accept_redirects" is an unknown key error: "net.ipv6.conf.default.accept_ra" is an unknown key error: "net.ipv6.conf.all.disable_ipv6" is an unknown key error: "net.ipv6.conf.default.disable_ipv6" is