![]() ![]() ![]() partial config of Godzilla.Ĭrypto isakmp key VAULT address 192.168.23.3Ĭrypto ipsec security-association lifetime seconds 1800Ĭrypto ipsec transform-set VPN esp-aes 256 esp-sha-hmacĪccess-list 101 permit ip 1.1.1.0 0.0.0.255 3.3.3.0 0.0.0.255Īlso, check the access list using the “sho ip access-list” to see how many matches. I assume the configuration of ospf shouldn’t be a problem, as that is not the main concern of this lab, so I won’t include it here. Once you are logged in you will find the configuration files right here. You need to register to download the GNS3 topology file. Try a ping from Router Godzilla’s Loopback0 interface destined to Router Nessie’s Loopback0 interface, if your configuration is correct then traffic should be encrypted.Verify the IPSEC configuration, you can use the following show/debug commands:.Create the correct crypto-map to finish the IPSEC configuration.Ensure you have a correct access-list on both Routers.You need to encrypt traffic from Router Godzilla’s Loopback0 interface destined to Nessie’s Loopback0 interface, create the correct access-list.Change the IPSEC security association lifetime to 1800 seconds. ![]() Configure the pre-shared-key “VAULT” which you will use for the IPSEC connection.We are going to configure an IPSEC connection between Router Godzilla and Nessie.Ensure you can ping 3.3.3.3 from Godzilla, sourced from it’s Loopback0 interface.Ensure that Godzilla and Nessie can ping each other.Configure OSPF on all 3 routers and advertise the following networks:.Router Godzilla and Nessie have a loopback interface:.All IP addresses have been preconfigured as specified in the topology picture.If you right-click on node in a topology you can open a different terminal than the default.Your network colleagues were very enthusiastic when you showed them that a GRE tunnel makes it possible to tunnel routing protocols across VPN connections, and after configuring the previous “GRE Tunnel Basic” lab (see our lab section) your colleagues now ask you to configure a basic IPSEC Site-to-Site VPN so they can configure encrypted GRE tunnels later. Use a different terminal just one at a time It’s outside the scope of this document to cover editing your PATH environment variable, or cover all the possible variables available for the many console applications available. For example, you’d add “C:\Program Files\some-console-app\program.exe”, and then any necessary variables. If the console application isn’t part of your PATH environment variable, you’ll need to include the full directory path to it. Modify the highlighted section above to include the application’s executable, along with any necessary variables required. If you choose Custom and Save, you can add a non-supported terminal to the dropdown list: In Edit->Preferences->General preferences->Console applications, you can edit the command used to start the console application.īelow are the predefined commands currently included: Use a custom Terminal You can direct GNS3 to use one of multiple other popular terminals (as options are provided in a handy dropdown selection menu), you can also create and save custom entries for any console applications (if needed), as well as temporarily use a custom console on a per-node basis in a project. GNS3 uses Solar-PuTTY as the default console terminal in Windows* (see note), and will attempt to use the default system terminal in other operating systems (gnome-terminal, for example, in vanilla Ubuntu). ![]()
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