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Joined: Tue Nov 19, 2013 11:40 am

Need Help!!

Fri Jul 31, 2015 3:45 am

Hi All

I was wondering if I could get some help with the following. I'm a newbie and I'm hoping someone can give me a step by step on how to achieve this scenario.

3 or 4 separate subnets all able to communicate to 1 common subnet. All subnets have 2 way comms to the common network but not to each other.

e.g - 1 device on the common subnet being able to access a device on each of the separate subnets, however the devices on the other subnets shouldn't be able to access each other.

I will really appreciate any help.


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Posts: 537
Joined: Fri Jul 23, 2010 1:09 am

Re: Need Help!! [limiting access between subnets]

Sat Aug 01, 2015 7:45 am

Add to your reading list:

You will want to configure the IP addresses on the appropriate interfaces.

Then you will want to add firewall rules to the forward chain permitting traffic from each subnet to the common subnet. You will also add rules to the forward chain permitting traffic from the common subnet to the other subnets. Then you will add a rule to the forward chain denying all traffic. This rule needs to be last. The others don't matter so much.

That should do it.

If you need more specific help, come back with more specific questions. And try to use a topic title which describes what you are trying to do. Generic topics such as "help" are less likely to get people's attention.

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