We need to configure the following steps to configure IPSec on Cisco ASA: Although, you can configure the IPSec tunnel on the Cisco Router first :). Success rate is 100 percent (5/5), round-trip min/avg/max = 20/28/30 ms Configuring the IPSec Tunnel on Cisco ASAįirst, we will configure the IPSec Tunnel on Cisco ASA Firewall. Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds: So, Let’s start the configuration by checking the connectivity between both the devices. The LAN subnet of the remote network is 192.168.2.0/24. On the other hand, Cisco Router (R1) connected with ISP using a 2.2.2.2/30 subnet. The outside network is 1.1.1.1/30 and the Inside network is 192.168.1. Both Cisco ASA and Router have static routable IP addresses. In this example, I have a Cisco ASA firewall and Cisco Router. IPSec tunnel allows you to send or receive encrypted traffic to the remote site over the Internet. So, let’s start! Scenario – How to Configure IPSec VPN between Cisco ASA and Cisco Router You must have static routable IP addresses to establish the IPSec tunnel. We will configure the Policy Based IPSec tunnel between both of them. Follow the steps below to do this:Ģ.) Drag and drop ‘Cloud’ to the GNS3 work-space and connect it with an Ethernet Switch. You can connect ASA from the computer from which you are running GNS3. (or download from )ģ.) Download asa842-initrd.gz and asa842-vmlinuzĤ.) Now Open GNS3 and go to Edit -> Preferences -> Qemu -> Qemu VMsĥ.) Click New and type a name of your ASA deviceĦ.) Select the type as ASA 8.4(2) and click Nextħ.) Leave the Qemu binary and RAM as it is and click NextĨ.) Now browse the initrd and Kernal image which you downloaded and click Finishĩ.) Last thing you need to do is add a few more interfaces by clicking Edit -> Network and change adapters from 4 to 6ġ1.) Now in the main GNs3 window click the Browse Security Device and drag your new ASA into the workspace. You can get it from your live ASA device by copying the image to a TFTP server. You may need to register/login to get the software.Ģ.) Get a copy of ASA 8.4.2 code. Please make sure that your computer has at least 4GB of RAM before you begin.ġ.) Download and install GNS3. In GNS3, QEMU is an emulator which emulates the hardware environment for a Cisco ASA device. This post will take you through a step-by-step guide to emulate Cisco ASA 8.4.2 on GNS3. I recommend signing up for Cisco VIRL and running the virtual appliances in the new GNS3 using VMWare Workstation. This guide is no longer my recommended way of running an ASA in GNS3.
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