What about treating the network as insecure and putting the rules you need on individual hosts?

--Ted

On 1/15/2016 2:53 PM, Ski Kacoroski wrote:
Hi,

I am part of a smallish (16 people) IT group and we are planning to redo
our network layout.  Currently we have a very simply layout with a
different class B for each of our 34 sites (e.g. site1 10.191.0.0, site2
10.172.0.0) with a few subranges defined.  This part I have pretty well
figured out based on the network topology and services.

The part I cannot figure out is what is the best practice for our
datacenter.  We currently break up subnets by type of machine (linux,
windows, blackbox, etc.).  The problem is that anyone on our network has
access to any server which is suboptimal.  What I want to do is limit
access to servers and server ports to the groups who need that access.

I can see two ways to do this with my current set up:

#1: I have an F5 BigIP and could set up vips for each server and then
have everything go through the F5.  Pluses are that it would log all
accesses and make block all other ports to the server.  I would put the
server team client machines onto a separate management network so they
have direct access to the servers.  Downside is setting this all up and
maintaining it.

#2: Set up separate networks for each groups client machines (server
team network team, database team, technology team), set up their servers
on separate vlans, and only allow them access to their servers.  Pluses
are once this is set up I only have to make sure the server is in the
correct vlan for the group to have access to it.  I would use the F5 to
allow public access to applications running on the servers.  Downside is
I have to make sure their client machines are on the correct vlans.

I am wondering what you have done and what you would do differently if
you had another chance?

Thanks for your time.

cheers,

ski

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