1. Centos 7 Disable Ipv6 Kickstart
2. Centos 7 Disable Ipv6 Autoconf
3. Centos 7 Disable Ipv6 Ifcfg

Disabling IPv6 on CentOS 7.5 is easy. This method was tested on a virtual server running in DigitalOcean and persists after reboots. First, let’s check to see that IPv6 is in fact enabled in a default CentOS 7.5 virtual server. For example, I disable ipv6 through sysctl using net.ipv6.conf. as you describe above and also disable ipv6 individually for sshd, networking, rsyslog, ntp, and postfix. There are many other services that you could disable ipv6 as well, but as long as the networking is not listening for ipv6 there should be no outside communication over ipv6.

By default, IPv6 has been set to enabled on linux CentOS 5.8 minimum installation. If you plan to disable this feature, you can follow these steps to completely disable it. This can avoid accidentally loaded IPv6 module.

All of our servers that are installed have dual stacked IPs, both IPv4 and IPv6 for consistency. Sometimes by default CentOS 7 doesn’t automatically enable to IPv6 functionality. If it doesn’t these are the items which you need to add to your network settings

Set IPv6 Gateway

In your network file add IPV6INIT and IPV6_DEFAULTGW

Make sure to use your default gateway here.

Centos 7 Disable Ipv6 Kickstart

Set IPv6 Static Interface Address

Next edit your interface configuration, all of our Dell R610 servers use em1, if you’ve got an older machine it may be eth0. Add IPV6INIT and IPv6ADDR to your interface settings.

So here we’re doing a couple of things, first we’re turning off auto configuration, then assigning a static IPv6 address to the interface, again make sure to update to your addresses.

Centos 7 Disable Ipv6 Autoconf

Next restart your interface

Now your settings should be active and IPv6 is enabled. Try pinging out

Centos 7 Disable Ipv6 Ifcfg

If that didn’t work check your settings and check your network configuration. Download sap 2000 v14.