Linux server and communication devices!!

[cybereatl]

Hello Folks,

I got the following scenario that am going to improve and I`ll like some ideas from your experiences if you can help me out!!

ISPConfig Server (3 IP)
Streaming Server (1 IP)
Webconferencing Server (2 IP)
File Server / Proxi / Internet (1 IP)
Radio Station Server (1 IP)
WAP Server (2 IP)

Am planning to set Astaro as main firewall for those servers but am concern about communication device becuase I got several IP addresses and if am not mistaken I should have several ethernet devices on main server to handle those request, correct me if am wrong.

Not sure what communication device I`ll need to work together with my firewall server.

Thank you