Load Balancing Products

MikroBT,

You can consider USG FLEX 200 or ATP200.

Specs of USG FLEX series:

https://www.zyxel.com/products_services/USG-FLEX-Firewall-USG-FLEX-100/license-and-spec

Specs of ATP series:

https://www.zyxel.com/products_services/ATP-Firewall-ZyWALL-ATP100/license-and-spec

For Zyxel devices, load balancing settings can be found under Configuration > Interface > Trunk > Default WAN Trunk menu.

A Trunk interface supports 3 types of Load Balancing Algorithms;

1-    Weighted Round Robin is for balancing traffic load between interfaces based on their respective weights. An interface with larger weight transmits more traffic than an interface with smaller weight.

2-    Least Load First algorithm used for sending session traffics through the least utilized trunk member.

3-    Spillover algorithm used for sending network traffics through to first member of the trunk until there’s enough traffic the second interface needs to be used.