BGP stands for Border Gateway Protocol, more commonly known as the system that keeps the internet (and by definition, routing) working correctly. Sometimes misconfigurations (Like accidentally announcing a wrong prefix) can break the internet. In this blog post, I will explain BGP Hijacking and how to prevent it. Primarily for people without network experience.
Here I will keep networking related posts.
The following script takes a Bind9 zonefile, gets all AAAA records from it and generated PTR records based on them.
What you need to do:
- Edit the Zone header in the script.
- Run the script with
This will output the zones on STDOUT. If you want to save this to a zonefile, you can use this example:
./generate_v6_ptr.sh /path/to/zonefile.zone > /etc/bind/ip6.arpa.zone
Thanks to the new VPC functionality in DigitalOcean can be used to provide Kubernetes with a static external IPv4. This can be handy in cases where you need to deal with IP whitelists, for example, if you use your Kubernetes cluster as a CI building tool. However, this requires some config setup and a privileged pod running on each node to automatically update the routes. This article will help guide you through the setup.