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Basic Network Security - locking down ports

I was just pulled into a team to provide a solution for a large government entity. I know some basic network stuff, but I need a good solution quickly.

Here's what we're trying to accomplish:

Lock down all the network ports in the building. As of now, anyone can plug in their personal laptop and access all parts of the network. We'd like to possibly us LDAP or MAC addresses from the laptops owned by the client the only access. Personal laptops should have access, but only basic internet if possible.

The building runs all of the ports off of a Cisco Catalyst 6500e switch. This is also a Windows Server environment. What are my options and the commands (unfamiliar with Cisco commands) to make this happen.

This is how to use mac addressess to secure your network.
http://www.techrepublic.com/blog/security/lock-down-cisco-switch-port-security/320
sorry but most of it is worth reading.
Greg

ASKER

What about using LDAP or DHCP? I'm just suggesting, I don't know how to actually do it properly.

Paolo Santiangeli

hi,
maybe 802.1x?

have a look here:
http://it.mmjp.net/?p=368

ASKER

Thanks, guys... We're looking at a quick fix using DHCP MAC filtering. Here's hoping.

Paolo Santiangeli

you have to pay attention: mac address can be discovered and spofed.

ASKER

We need the most basic level at this point. We can get more advanced later. We're looking at a quick solution to put out a few fires immediately.

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Paolo Santiangeli

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ASKER

That's exactly what we're looking at trying. THANKS!