Based on this product's specifications, here are some alternatives and similar models
Hardware firewall SecurePoint RC2000RR G6 1U — 91 Gbit/s throughput, 2000 users, AES, SSD storage, 2.5 Gbit/s Ethernet
Summary description:
SecurePoint RC2000RR G6 is a 1U hardware firewall designed for enterprise networks. It delivers 91 Gbit/s firewall throughput, 6 Gbit/s HTTP-proxy throughput and 11 Gbit/s VPN throughput, supports up to 2000 users and AES security algorithms. Wired connectivity includes Ethernet ports with combined data rates up to 2500 Mbit/s and an RJ-45 console port; internal SSD provides storage.