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VPN client tunnel traffic traversing l2l tunnel

Posted on 2007-11-30
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Last Modified: 2011-10-03
I am trying to setup my ASA so client VPN traffic traverses a l2l tunnel to another firewall.  I know this wasn't possible on a PIX but was told this could be done on a ASA but can't find any documentation on how to do it.  It seems just putting in the propper acl lines for the tunnel and nonat lists won't do it alone.
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Question by:RolandCT
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by:batry_boy
ID: 20386574
Yes, you can do this...I've done it before.  Here's a section of code that should get you going.

In the code snippet, the following values are used:

x.x.x.x is the public IP address of the tunnel peer device for the L2L tunnel.
192.168.100.1-254 is the VPN pool of addresses
172.16.100.0/24 is the remote network on the other end of the L2L tunnel

I didn't include the code used for the setup of the remote access VPN tunnel, but you should be able to incorporate the code below into your existing configuration.
access-list outside_nat0_outbound extended permit ip 192.168.100.0 255.255.255.0 172.16.100.0 255.255.255.0
access-list outside_cryptomap_20 extended permit ip 192.168.100.0 255.255.255.0 172.16.100.0 255.255.255.0
ip local pool vpnpool 192.168.100.1-192.168.100.254 mask 255.255.255.0
nat (outside) 0 access-list outside_nat0_outbound
 
crypto map outside_map 20 match address outside_cryptomap_20
crypto map outside_map 20 set peer x.x.x.x
crypto map outside_map 20 set transform-set ESP-AES-256-SHA
crypto map outside_map 20 set security-association lifetime seconds 28800

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Author Comment

by:RolandCT
ID: 20395914
I have the equivalent of those lines in my config but it still is not working.  I have the vpn client traffic being nonat'ed and specified in the vpn tunnel access list.  I was under the assumption there was an additional command to allow this vpn tunnel through vpn tunnel traffic to happen.
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batry_boy earned 500 total points
ID: 20396076
Oops..yes, there is:

same-security-traffic permit intra-interface

Sorry about that...
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Author Comment

by:RolandCT
ID: 20396134
OK, I will try that and let you know.

Thank you,
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