hey all, I tried disabling tcp v6 on a C7 box this way: [root at puppet:~] #cat /etc/sysctl.conf # System default settings live in /usr/lib/sysctl.d/00-system.conf. # To override those settings, enter new settings here, or in an /etc/sysctl.d/<name>.conf file # # For more information, see sysctl.conf(5) and sysctl.d(5). net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 Then going: [root at puppet:~] #sysctl -p net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 Then I restarted xinetd for good measure: [root at puppet:~] #systemctl restart xinetd [root at puppet:~] # Because I'm trying to hit nrpe on this host. Yet, xinetd/nrpe still seems to be listeing on TCP v6!! [root at puppet:~] #netstat -tulpn | grep -i listen | grep xinetd tcp6 0 0 :::5666 :::* LISTEN 2915/xinetd This is a CentOS 7.1 box: [root at puppet:~] #cat /etc/redhat-release CentOS Linux release 7.1.1503 (Core) What am I doing wrong? I need to be able to disable tcpv6 completely! Thanks Tim -- GPG me!! gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B