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04/30/2009 at 02:24PM PDT, ID: 24370795
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8.5

Routing / Topology Design Question

Asked by RHMaxwell in Network Design & Methodology, Network Routers, Networking Hardware Firewalls

Tags: WAN, LAN, Routing, Topology, Network Design

I am trying to design a new infrastructure model for the company at which I am employed.  I have been handed a certain set of criteria that has me a little perplexed.  I will lay this out as plainly as I can.

1. LAN1 = PLC's, Touchscreen's, Robots, and workstations that are all hard-coded with 10.0.0.0/8 ip addresses.  The amount of reprogramming require to convert to LAN2 is not economically viable.  Currently, all traffic is being routed via a CheckPoint UTM-1 450 device with two ip addresses (10.3.1.1, 172.19.176.3) on the Internal interface.

2. LAN2 = Workstations, Laptops, Printers, Servers, Networking equipment needed for the rest of the LAN infrastructure.  All equipment in this LAN is either Hard coded or DHCP addressed with a 172.19.176.0/21 address.  Currently, all traffic is being routed via a CheckPoint UTM-1 450 device with two ip addresses (10.3.1.1, 172.19.176.3) on the Internal interface.

3. WAN = This is the connection back to our parent company through a Juniper Netscreen device that I have absolutely no access to what so ever.  This device, while located on site, is completely controlled by our corporate MIS dept.

I do have a Cisco 2621XM-RPS router at my disposal if it is needed.

What I need to accomplish is:

LAN1 (10.0.0.0/8) be able to communicate with LAN2 only
LAN2 (172.19.176.0/21) be able to communicate with both LAN1 and WAN
LAN2 WAN traffic has to utilize the Juniper Netscreen
LAN2 Internet traffic needs to utilize the CheckPoint (to keep internet traffic from going back up the WAN)

Additional Info:

We currently have a version of this in place now, but with the DC and Exchange servers gateway being the NetScreen and everything else pointing to the CheckPoint, I am having some issues with DNS across my VLAN's that are configured on the CheckPoint.  Since I don't have access into the Netscreen, I can not configure the VLAN's on it for proper tagging of packets as they cross that device.  I need a sloution that does not require seperate gateways even though I do not want any internet traffic going across my WAN connection.  I also need to be able to shutdown the WAN connection in the event of DOS attacks (which have come from the WAN before), allowing my LAN's to continue operations.
Attachments:
 
Network-Topology.pdf (376 KB) (File Type Details) 
Current Topology - Generalized
 
[+][-]05/02/09 08:43 AM, ID: 24286483

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[+][-]05/04/09 02:40 PM, ID: 24299537

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[+][-]05/07/09 03:01 PM, ID: 24331100

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About this solution

Zones: Network Design & Methodology, Network Routers, Networking Hardware Firewalls
Tags: WAN, LAN, Routing, Topology, Network Design
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Solution Provided By: dons6718
Participating Experts: 1
Solution Grade: A
 
 
 
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