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FREESCO Support • View topic - Restric Access To Local Ips
Page 1 of 1

PostPosted: Wed Feb 18, 2009 8:40 am
by caveman
Hi,

I have a local network with more than 15 PCs on it. Sometimes people bring their laptops at the office an hock them on the lan and start downloading stuff (torrents and more). As a result the internet connection suffers.
My lan is configured to serv static IP using MAC addresses.
Those laptops do not get an IP from the DHCP, but instead the people own them, apply to the laptop static IP settings by hand that are in the range but not used by anyone else.
What i want to do, is restrict access to internet (and local net if possible) to any IP that is not assigned by the DHCP server on freesco.
How is that possible?

PostPosted: Wed Feb 18, 2009 2:14 pm
by dingetje
Not that difficult. You know your DHCP address range, so everything outside that range can be blocked by either using a firewall rule in rc_user or by using the BAN feature of FREESCO (via web control panel).

Really smart road warriors can still get access though by faking the MAC address of one of the existing PC's and get a lease that way. There's not much you can do against that, I'm afraid.

PostPosted: Wed Feb 18, 2009 2:20 pm
by dingetje
Another idea is to use the knock package. This is an add-on package that can take action (like opening the firewall) when a specific "knock on the door" package is received via the network.

Clients that are allowed access have a small software installed that generates the correct knock sequence and are granted access.

More complicated to setup though!

PostPosted: Wed Feb 18, 2009 8:14 pm
by Lightning
If you attach a report.txt we can give you the firewall rules to block everything except for the allowed IP addresses. But in general it will be easiest just use ban the entire subnet and then allow those IP addresses using the ban/allow or "restrict" configuration. This can also be used on a time basis so that after work hours then the Internet access is completely stopped to all IP's or just some of them. It really depends on how tight you want to control the network. So I guess being more descriptive of exactly what your optimal configuration would be will help us give you a detailed answer on how to resolve this.

PostPosted: Fri Feb 20, 2009 4:27 pm
by caveman