This blog post introduces how to configure Destination NAT (DNAT, or Static NAT) and port forwarding in a Linux router, using iptables.

Last post has introduced how to support systemd services in Ubuntu and Debian containers. The same issue also exists in CentOS/Redhat and the variants, including Rocky Linux, AlmaLinux and OracleLinux. This article explains how to support systemd services in the CentOS/Rocky/Alma/OracleLinux docker containers.

As of now, many system and application services in linux distributions are managed by systemd. However, systemd is not supported by default in docker containers. This article explains how to support systemd services in docker containers.

This part will introduce how to configure a Linux router to run with Dynamic BGP. BGP (Border Gateway Protocol) is a gateway protocol which is widely used to exchange routing information between routers.

Recently I need to test BGP settings of a router. However I do not have operate permission on the upstream router. Therefore I decided to add a Linux router between. This article introduces how to set up a linux router with dynamic BGP.