If you ever needed to hide multiple systems behind a single IP address you would use PAT. (Port Address Translation) besides using this to connect to the internet when using an RFC 1918 address, you can configure PAT for VPN connections. The benefit is the same, hide multiple systems behind a single IP address with the advantage being you can have many systems on one side of the VPN tunnel all using that single IP.
I have ran through before on how to create a site-to-site VPN with Cisco SDM which sounds like a repeat but I thought why not bring CCP into light and since I’m studying the newly created CCNA Security (640-554) I figured let’s create a tutorial on it. In this lab I am going to post the running-config of both locations so you can either run it through Packet Tracer or live equipment if you wish. I am running two Cisco 2811s with Advanced Security Version 12.4(24)T8. Let’s do it! Continue reading
So for today’s post let’s learn how to configure a site-to-site VPN on a router using the Cisco SDM (Security Device Manger). The Cisco SDM is a Web-based device management tool a GUI for Cisco routers this can simplify router deployments and cut ownership costs. (See the post Configuring SDM) Let’s start configuring a site-to-site VPN with SDM! Continue reading