Internet connection through a small business server

Modems/Cable Modems
I have a small network consisting 5 users running XP on a Windows 2003 small business server. The existing internet connection is via a dial up modem which is connected to one PC. I wish to install ADSL/Broadband and I wish to give all users access to the internet through the server. What is the simplest method of implementing this, your help on this is much appreciated.

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Proberbly the best way is to sine up to a broadband provider and purchase an Adsl router attache this to the network and with a little bit of config you’ll be away! hope this helps.

Cheers Simon

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  • Technoeldersensei
    Hey Pauline, Not sure of your location, but here in Puerto Rico our largest ADSL provider is the local phone company and the modem they provide for business accounts can connect to four computers via ethernet plus one more via USB, maybe you should look into that kind of account with your local ASDL provider before going the server route. I have found the less going through your server, the better off it is. Anyway, this is just a suggestion, good luck! Technoelder_sensei Don S. Puerto Rico
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  • Pauline16
    Thanks to all for your suggestions, I've now resolved the problem.
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  • Onilke
    See you've solved the question. Would just like to mention two issues you might run into: 1) If the ADSL provider restricts the number of IP addresses available for your outbound traffic (they sometimes expect you to connect one - and one only - PC). 2) Data security: If you would like to restrict access to your network from the outside. In both cases you need at least a router that can "represent" the network using an IP address from the ADSL provider, while the PCs and the server on the inside are using "private" IP addresses, not visible from the outside (also called Network Address Translation - NAT: to the outside it will seem that all traffic comes from and returns to the one outside address). Connecting to Internet you will sooner or later be reminded that data security is an important issue (avoiding crackers, virus, spam etc.). Better start looking into the matter now.
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  • ArrghOff2Pillage
    Is there a specific reason for going through the server as opposed to going through a gateway device such as a watchguard SOHO, other than cost? I believe using the ISA built into SBS will work ok, and I have a few clients who do it. However, from a security standpoint, I prefer to keep the device securing me from the network separate from my NOS. As such, they have two hurdles to overcome, (Cracking the firewall then the OS)as opposed to finding a fault in an OS that has numerous security holes. If you are a small company doing this on your own, I would suggest a firewall such as the Watchguard SOHO, or a Sonicwall, as the web interface is easier to configure. I would suggest on any solution that you block 445, 135-139, 6665-6669, 8888, 9999 from outbound traffic (it should be blocked inbound on all firewalls). The first two sets helps protect you from standard windows AD and SMB attacks, and the latter are some prreventative measures to prevent an inside out attack via mIRC clients that may get downloaded via spyware. (we have seen two domains destroyed by such attacks, walked in on a third. Was able to trace the third back to a web site that had been infected with a driveby download)
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