Fragmented Technical Notes
For whatever reason I have was having the hardest time getting the MailGun plugin for GravityForms to use my From Email domain in WordPress.
Every time I tried to update the settings, I’d get the following error:
Continue reading “Active Domain Error in GravityForms MailGun plugin”In a previous article, we showed how to block specific domains at the DNS level using iptables. Today, we will expand into that and show how to also block HTTP requests for a specific domain (or URL) in there.
Iptables string matching is very powerful and easier to use than the hex-string module we used before. When you specify -m string –string, it will activate the string module and inspect at the packet content for the keyword you are looking for.
Continue reading “Blocking HTTP requests via Iptables for a specific domain”Most servers get a IPv6 range (/64) by default. That means that you have millions of IP addresses to use for whatever you feel like. However, assigning them manually to your interfaces can be a bit painful.
However, there is a trick with the ip route command that allows you to link your /64 to the local interface and cover all of them automatically:
Continue reading “Binding multiple IPv6 addresses automatically”