Deaktivace IPv6 v RedHat & spol. (RH, Fedora, CentOS, …)

Pokud neplánujete používat protokol IP v. 6, můžete jeho podporu ve svém systému zcela vypnout.

Postupujte takto:

1. Disable IPv6 Networking Support
   Edit /etc/sysconfig/network. (A reboot will be required)

   Change:
   NETWORKING_IPV6=yes

   To:
   NETWORKING_IPV6=no

2. Disable IPv6 Protocol Stack for Kernel
   Edit /etc/modprobe.conf

   Add the following 2 lines: (A reboot will be required)
   
alias net-pf-10 off
alias ipv6 off


3. Disable IPv6 Firewall
   Stop ipv6 firewall:
   /etc/init.d/ip6tables stop

   Turn ipv6 firewall off during future usage:
   /sbin/chkconfig --level 35 ip6tables off

4. Issue with localhost
   In /etc/hosts, the following entry for localhost using IPv6 can be removed:

   ::1 localhost.localdomain localhost

   If you choose to remove the above IPv6 entry, then you must keep the following IPv4 entry for localhost:

   127.0.0.1 localhost.localdomain localhost