Arduino As IR Ethernet controller

Hi
I totaly new to Arduino
that why I asking if it possible to make IR Ethernet controller that work like usb- uirt
http://www.usbuirt.com/.

I have one usb uirt and it works well.

I have to long distance in my house to use usb everywhere.
I have ethernet in all rooms. thats why my idee to have ir over Ethernet.

The software I use are homeseer whit blueusbuirt plugin and it use the seriel communicate. to send instruction to usb-uirt to send ir commands

I now it possible to use Arduino as ir transmitter but not sure if it possible to get arduino work as av serial (comport) server and combine this to?

I have found at software that ca make at virtual comport over TCP/IP so need somehow get a comport server on arduino?

Best Regard
David