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Network Reconfiguration

By rphillips ·
I need the ability to physically disconnect computer labs independently from the internet without losing any other network resources. (ie. printers or user folders). My present configuration doesn't allow this. I have 4 computer labs that connect to a single switch as well as the PDC and 2 BDCs and then that connects to the router. I have no access to the router programming. We are using DHCP. What I want to be able to do is have the ability to disconnect any lab from the internet without losing any other network resource. Thanks in advance for any suggestions.

rphillips@itt-tech.edu

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by jschein In reply to Network Reconfiguration

no access to the router?...

remove dns from the pc's... So vague though.

Can you not modify the router, or do not know how? Your server (being it is controling labs), I am sure is having the systems log onto the domain... You can set policies for computer / usernames internet access times through the group policies. But if that does not help, what can you buy / do at your location to better answer your question.

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by carlos.nino In reply to Network Reconfiguration

I'd go for wireless lan connections. That way you can separate the internet from the lan, which will give you more freedom (to configure access and stuff), and you just have to worry about plugging in the cable for the internet when needed. Also, it could be interesting to split security problems to work them out better.

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by Mark In reply to Network Reconfiguration

There's always many ways to accomplish tasks as this and without all the details it's hard to recommend the best, but I would either get access to the router and subnet the labs into different networks, or buy 4 cheap routers to separate them yourself (about $50 per router), or research some control software like one of these. The people who sell the software can probably help you too.

http://www.codework.com/bcontrol/product.html

http://www.access-control-software.com/access-control-pro.htm

http://www.n2h2.com/products/bess_home.php

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by Rasman In reply to Network Reconfiguration

No problem.Multihome one of you servers turn on routing and remote access. Configure nat, set the nat server as the default gateway have it route all off network traffic to the router. Or... Setup vlans for each network configure the switch for vlans use the nat server as a route on a stick.
Enjoy
Ras.

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by cw In reply to Network Reconfiguration

Based on your information your answer is an easy one. There are many ways to accomplish this, and some of those have already been suggested,but I think you will find this one will be the simplest to implement for your needs and will not require additional equipment or complex configurations.

Since you do not have access to the router, but do have control of the DHCP server, therein lies your solution. Since all clients require a "Default Gateway" to access the Internet, you can simply remove the Default Gateway (router) setting from your DHCP scope on the DHCP server. In the DHCP server simply relase the addresses and walla, no Internet but you will still be able to communicate on the local internal subnet.

Hope this helps

Chris Weber CCDP

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