We are in the process of switching to a new internet provider in our office and have run into some problems. We are a non-profit and I am a one-man IT shop so any help will be greatly appreciated! Our old setup was with AT&T, where they provided a managed router which linked to our internal switch and also provided NAT to the internal IP of our email server.
Our new setup right now is just the internet coming in through a cable connected to a switch, we were told we needed to provide our own router. Someone donated a Cisco 2900.
What should our proper set-up be? Should the internet come in directly to the router and then to our switch, or should it go to the switch they provided, then the router, and then our switch?
Also, there seems to be some confusion about whether or not we need anything else to get the internet to work. There are slots for network cards in the router. Does it come with at least one built in we can use, or do we need to provide one?
Thanks for all your help!