Jason's Notes

I use PeerGuardian Linux to block IPs as extra layer of protection my servers. Because I block more than I need, I wanted a way to quickly add IPs to the allow.p2p file by their hostname. Below is the contents of my “Add_Allow_IPs” script.
nslookup $1 | sed -e '1,4 d' -e '$ d' -e 'N;s/\n/ /' -e 's/ Address: /:/g' -e 's/Name:\t//g' >> /etc/pgl/allow.p2p
sudo pglcmd reload
sudo pglcmd restart


So now if I run:
./Add_Allow_IPs google.com
It will take out all the google.com ipv4 addresses from nslookup output and make them line items in the allow.p2p file. It dose not work for IPV6 and CNAME results.