Careful, Win server licensing has a lot of paths / pitfalls that a single base license may not cover (#5) http://blogs.technet.com/b/volume-licensing/archive/2014/03/...
"1 – Does my Multifunction Printer need a CAL?
Yes, if the multifunction printer is connected to a Windows Server network. A multifunction printer accesses server software to; receive an IP address, to receive a job, to communicate that the job is finished, etc"
So if your printer gets a DHCP address from your windows server, the printer needs a CAL !
And that's the #1 item they list.
And then there's #5 (which you mention) which has the caveat which could mean you need a CAL for anyone on the internet accessing your web server.