Founded in 1989, ZyXEL is a popular router manufacturer. ZyXEL routers are easy to navigate and setup. They are of high quality and speed.
Typically, ZyXEL routers are fairly easy to configure, but their port forwarding section is a little more challenging. Normally, a ZyXEL router refers to a port forward as a NAT/SUA Server, which can be a bit confusing. When creating a port forward you need to make sure SUA Only is marked. If it is not marked you cannot continue until you have made some major changes to your network. This is not normally a problem however and you should have no problem configuring your ZyXEL router.
If your exact ZyXEL router is not in the list below, we recommend trying our ZyXEL Prestige 623 guide. This guide should get you that open port you want on just about any ZyXEL router.