Network Adress Translation

Posted on 2003-03-10
Medium Priority
Last Modified: 2010-08-05
I have a Windows 2000 network with Windows 2000 server, I use Microsoft DHCP and DNS from ISP. I have a IP from ISP. Also I have Active Directory instaled. I use Microsoft Network Adress Translation with 2 network card: one for internet and one for local area network. Local I use IP reservation class 192.168.x.x. Every client reveive IP, mask, from Microsoft DHCP server. Only DNS I receive from Internet Service Provider. My biggest problem is that internet connection is down very often in random time and internet starts when I open to server any internet page with internet explorer. Where is the problem?. When I made mistake on server configuration.
Question by:woblerman
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Expert Comment

ID: 8101965
What kind of internet connection do you have ?

If internet only come back when you open an HTTP page on your server... that means that you might have a dial-up connection ?


Expert Comment

ID: 8102022
Disable Dial on demand future in Routing And Remote Access Service.


Author Comment

ID: 8102133
I don't have Dial on demand future instaled
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Accepted Solution

lrmoore earned 500 total points
ID: 8102654
In my opinion, a Microsoft server will never function well as either a router or a firewall. You're asking yours to be both. If you have AD installed, you cannot use your ISP's DNS as your primary. You have to have your own. You also have your server as a DHCP client on one NIC and as a server on the other.

>My biggest problem is that internet connection is down very often in random time and internet starts when I open to server any internet page with internet explorer.

Sounds like a timeout issue with the ISP. I refer back to my first statement.

My suggestions:
1. Get a router to connect to the ISP and maintain the open connection
2. Get a firewall to put between the server and the ISP
3. Let your firewall do the NAT
4. Let your server just be a server for your clients.

Your business model and budget will dictate what you use for each role. If you have a broadband connection, you can get a small Linksys or D-link router that has built in stateful firewall and NAT all wrapped up in one <$50 package.

If you want the real deal, I'm partial to Cisco. A PIX firewall would be all you need if you have broadband with a modem that hands you off an Ethernet connection:


Expert Comment

ID: 9153189
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Expert Comment

ID: 9162656
RECOMMENDATION: Points awarded to: lrmoore

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