ASA as point endpoint l2l and route remote peer

Hello dear community support.

I need to set up the following scenario:

I managed to create the tunnels of routers to ASA, but there are 2 questions:

  1. Remote local networks, I'm not able to ping inside the interface interface, apart if I use the management-access command on my inside, I don't want to.
  2. Remote local networks cannot communicate with each other. Is there some routing that I should add? My Interface inside has a permit temporary icmp a whole, and I guess the ASA must bring up the appropriate routes when the tunnels appears. I have identfyed the roads properly in my Crypto Card and on my remote routers.

As my remote routers all have dynamic IP addresses assigned, they all fall into the Group of the defaultl2l Tunnel. Is this wrong?

Any ideas or suggestions would be highly appreciated

Thank you very much for your help!

Hello

The ASAs generally have a limit that you can not ICMP/PING an interface behind another interface of the ASA. command "access management" is the only way to activate the Protocol ICMP interface via another interface. And also this only applies to connections that arrive via a VPN connection.

So if you want ICMP/PING the interface 'inside' of the ASA to remote sites, you can use the command "access management" . If management connections are your worries you should limit the management as well as remote network will not be able to manage the ASA. Of course, they also know the login information to even have the option to manage the ASA?

As for your other question, there are some things you need to make the connections between the Remote LAN if you intend to do this via the central site with the ASA.

  • You will need to have the command "permit same-security-traffic intra-interface" configured on the SAA. This command will allow traffic to enter and exit the same interface on the ASA. In your case, it would be the "outside" interface, which would be the only interface through which traffic between remote LANs would traverse through the ASA
  • You will need to define the interesting connections VPN L2L traffic so that it includes this traffic
    • ASA l2l to a peripheral remote site VPN VPN connection must have as source address for traffic interesting the other network to remote sites.
    • The remote VPN device l2l VPN connection must have as destination address of the remote network
  • You need NAT0 configurations for traffic on the remote site VPN devices
  • You will need to have a configuration NAT0 on the SAA for this traffic that will flow between remote sites through the ASA. This NAT0 configuration must be configured on the 'outside' interface. The format of configuration depends on your level of Software ASA

If you mention that you are using a default VPN L2L "tunnel-group" both of the connections.

I suggest you look at this document. It would allow to the allows you to configure remote sites, so that you can set up other than "tunnel-group" for them on the SAA and accomplish what you want.

http://www.Cisco.com/en/us/products/ps6120/products_tech_note09186a0080bc7d13.shtml

Hope this helps

-Jouni

Tags: Cisco Security

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