Here's a very helpful method we can use to extract all IPV4 addresses out of a file, such as httpd.conf for for example.
sed -n 's/\([0-9]\{1,3\}\.\)\{3\}[0-9]\{1,3\}/\nip&\n/gp' /pathtofilehere | sed 's/ip//'
Running
it on my local resolv.conf file, here's what some output will look
like. Apache or any other daemon will look quite similar.
E-Rodriguezs-MacBook-Pro:/ erodriguez$ sed -n 's/\([0-9]\{1,3\}\.\)\{3\}[0-9]\{1,3\}/\nip&\n/gp' /etc/resolv.conf | sed 's/ip//'
nameserver
8.8.8.8
nameserver
8.8.4.4
nameserver
207.210.208.138
nameserver
207.210.211.118