If you have a home lab or a service in K3S/K8S that you want to expose to the world, but you don’t have a public IP, what can you do? Especially in today’s world where ISPs often provide Carrier-grade NAT, or what’s commonly known as large-scale NAT (LSN), making it difficult to update IPs with DDNS. This is where the hero of this article comes in.

We can adjust sysctl settings to make Linux servers run smoothly under increased load. Normally, each Linux distribution has a default sysctl configuration. For example, RHEL might be optimized for server use, while DEB might be balanced for general performance. In this article, I will introduce the settings I use in production for each type of workload: