Connected to Allen Bradley PLC however cant view tags over network?


I am able to connect to my Allen Bradley PLC and browse tags when I plug my computer directly into the Ethernet port for the plc. However when I try and connect remotely over my work network I can connect to the PLC but I am unable to browse the available tags? Logically I take it something a router/firewall is doing something but I am not sure? Any anyone experience this?