I think the easiest thing for you would be using a firewall at your HO site. An other option would be to virtualise your network and to do selelctiv route target import/export on the necessary sites. I think that should be possible with the 3560 with VRF's. Instead of import/export you can also use a firewall for that job.
If your adressing scheme is clear, then a firewall at the HO site is certanly the easiest thing to do.
1) I believe you should do some static routing between the sites using the microwave links. This will save you the BW utilized by the full routing updates created by RIP. You can do some route redistribution as needed.
2) I would suggest a GRE Tunnel with IPsec. I agree with the post above, you should secure the data crossing the airwaves. Use an access list at HQ to filter traffic from other sites other than site 1.
3) Use a DHCP locally for site one. Again, maximize your BW, by not having DHCP requests and replies having to cross the slowest links. NAT should be done at the EDGE where your network meets to the Internet.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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