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How to integrate 2 offices running different ISPs?

I currently have an office running on ISP "A". In this LAN, I have the Business Server which they all can access and share. We extended our office and have a different building that will be using ISP "B" (different). What would be the different ways to integrate both offices so they can both use and access the Business server while maintaining their respective speeds (ISP B is faster thatn ISP A)
Some Details: Business Server has 1 NIC card and Offices are close enough were a cable can be run in between them.

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drewha1969

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drewha1969

To summarize further, 1 would be the best choice if the cost is good. 3 would be better performance than 2, but it would cost more due to licensing.

Stewart Beel

You can physically connect the two offices with a CAT5e cable, preferably with a gigabit port. This will enable both offices to have access to the network / server, however you could specify a different Default Gateway for the PC's in the second office using ISP B.

Dave Messman

why not connect the offices via ethernet cable (a no brainer if they are less than 100 meters from each other) and eliminate ISP A unless you want it for redundancy

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strung

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Argie_IT

ASKER

Thanks everyone for the suggestions. We had the offices connected through a cable and with only one ISP A. My client still wanted to have ISP B in the remote office that offered him higher speed without dismantling the network for ISP A (I know, making things harder)

So, with this said, keeping 1 ISP is not a choice; running a cable from one office to the other has already been done but now we want to keep such with the inclusion of ISP B.

Routers or VPN seems to be options. Thanks again.

Dave Messman

in this case, what the client wants doesn't make sense. You should use strung's suggestion and use a router that supports two ISPs (like Syswan or Fortinet). Syswan will allow teaming of the ISPs for theoretically a faster connection.

A site to site VPN is not logical here as it's meant to connect two remote networks. But your networks are already connected.

strung

The Fortigate 60 should meet your needs. It has dual WAN connections. We have used one in our office for years and are quite happy with it. We had is set to use the slow ISP for mail and the fast ISP for web browsing, but it is very flexible. It also comes with an excellent security suite that does anti-virus and spam scanning at the router, so viruses never even reach your computers:

http://www.fortinet.com/products/fortigate/60B.html