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02.15.2007 at 11:33AM PST, ID: 22392290
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6.6

Need help with configuration of PIX 515E to remote Cisco 871W site to site VPN with dynamic addressing

Asked by verance in Cisco PIX Firewall

Tags: ,

Here is my basic setup:

PIX 515 with IOS 7.1(2) connected via site to site vpn with a Cisco 871W (IOS 12.4).

I originally set this up with a static address for the point to point between these two systems and that worked great.

Now the user on the remote side changed his ISP and is getting dynamic addressing.    So of course every time his ISP makes a change a couple of changes need to be made on the central PIX.

I referenced the following Cisco article that discusses such a setup between two pix devices:
http://www.cisco.com/en/US/products/sw/secursw/ps2308/products_configuration_example09186a0080094680.shtml

I need a check on the config of the two devices.

Here is how it's setup on the PIX now:

crypto map VERANCE-VPN-MAP 200 set peer <external IP masked> <---current external IP of remote device
crypto map VERANCE-VPN-MAP 200 set transform-set DEFAULT-TRANSFORM-SET

tunnel-group <external IP masked> type ipsec-l2l    <---current external IP of remote device
tunnel-group <external IP masked> ipsec-attributes  <---current external IP of remote device
 pre-shared-key *

and on the 871W:

crypto isakmp policy 10
 authentication pre-share
crypto isakmp key ********* address <external IP masked>  <---current external IP central PIX

____________________________________________________________________

The article mentions that the main setting change that should take place on the central PIX are (as interpreted by me):


crypto map VERANCE-VPN-MAP 200 set peer 0.0.0.0
crypto map VERANCE-VPN-MAP 200 set transform-set DEFAULT-TRANSFORM-SET

isakmp key ******** address 0.0.0.0 netmask 0.0.0.0

(this would replace the lines above)

Nothing would be changed on the remote 871W (unless of course the external IP address of the central PIX were to change).

Is this the only change that would need to be made - or is there more coding involved?

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[+][-]02.15.2007 at 04:36PM PST, ID: 18545280

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Zone: Cisco PIX Firewall
Tags: pix, cisco
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Solution Provided By: batry_boy
Participating Experts: 1
Solution Grade: A
 
 
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