Question

Replacing 1720 with ASA5505, Dynamic VPN Issue

Asked by: carl_legere

I have a failing 1720 router that is the center-point to a vpn with two dynamic 1720 routers connecting to it. It also is supporting PPTP VPN connections but I am planning on replacing those with Cisco VPN Software clients.

My problem is with the two dynamic VPN's. I am unable to connect them to my newly configured ASA5505, because the commands have changed and I can no longer specify no-xauth with my pre-shared key. I need help.

When I enter my pre-shared key command it ends up in the tunnel-group DefaultRAGroup, which is fine, but my remote routers get stuck at XAUTH. I need xauth obviously for the remote VPN clients to work, and I want to ignore XAUTH for the two dynamic 1720 routers that use the preshared key.

I have attached the important part of the configs. 

Dying 1720 (working) config:
 
crypto isakmp policy 1
 hash md5
 authentication pre-share
 group 2
crypto isakmp key supersecret address 0.0.0.0 0.0.0.0 no-xauth
crypto isakmp keepalive 10
!
crypto isakmp client configuration group hvfclient
 key moresecrets
 dns INSIDEDNS
 wins INSIDEWINS
 domain MYDOMAIN
 pool vpnpool
!
!
crypto ipsec transform-set des esp-des esp-md5-hmac
!
crypto dynamic-map vpn-des-dyn 1
 set transform-set des
!
!
crypto map vpn-des client authentication list userauthen
crypto map vpn-des isakmp authorization list groupauthor
crypto map vpn-des client configuration address respond
crypto map vpn-des 1 ipsec-isakmp dynamic vpn-des-dyn
 
********************************
Working 1720 at remote location:
 
crypto isakmp policy 1
 hash md5
 authentication pre-share
 group 2
crypto isakmp key supersecret address DYING1720ADDRESS
crypto isakmp keepalive 10
!
!
crypto ipsec transform-set des esp-des esp-md5-hmac
!
crypto dynamic-map dynmap 1
 set transform-set des
!
!
crypto map vpn-des 1 ipsec-isakmp dynamic dynmap
crypto map vpn-des 10 ipsec-isakmp
 set peer DYING1720ADDRESSS
 set transform-set des
 match address 111

                                  
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Asked On
2008-04-10 at 06:53:29ID23311685
Tags

cisco

,

ASA Router

,

ASA5505

Topics

Virtual Private Networking (VPN)

,

Cisco PIX Firewall

,

Network Routers

Participating Experts
1
Points
500
Comments
5

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Answers

 

by: carl_legerePosted on 2008-04-10 at 07:04:33ID: 21324860

Sorry - should have set 500 points initially.

 

by: batry_boyPosted on 2008-04-11 at 09:44:57ID: 21335875

To turn off xauth for the DefaultRAGroup, use the following commands:

tunnel-group DefaultRAGroup ipsec-attributes
isakmp ikev1-user-authentication none

If you still want to use xauth for your remote VPN clients, make sure they are using another group policy other than DefaultRAGroup when connecting and you should be good.

 

by: carl_legerePosted on 2008-04-11 at 10:23:41ID: 21336245

I already had that command set up.  I have a separate group policy specified for my other vpns - but am unsure how to specify that vpn clients connect to them, besid

Here is my current asa crypto config (and related), is there anything that is obviously missing?  

crypto ipsec transform-set TS1NAME esp-des esp-md5-hmac
crypto dynamic-map dynmap 10 set transform-set TS1NAME
crypto map CMNAME 65535 ipsec-isakmp dynamic dynmap
crypto map CMNAME interface outside
crypto isakmp enable outside
crypto isakmp policy 1
 authentication pre-share
 encryption des
 hash md5
 group 2
 lifetime 86400
 
group-policy myVPN internal
group-policy myVPN attributes
 split-tunnel-policy tunnelspecified
 split-tunnel-network-list value Split_Tunnel_List
tunnel-group myVPN type ipsec-ra
tunnel-group myVPN general-attributes
 address-pool remote
tunnel-group myVPN ipsec-attributes
 pre-shared-key *
tunnel-group DefaultRAGroup ipsec-attributes
 pre-shared-key *
 isakmp ikev1-user-authentication none
                                              
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by: carl_legerePosted on 2008-04-11 at 11:15:56ID: 21336742

I figured it out.  I left out the no-xauth on the remote side.  Worked like a charm once I specified that.

 

by: batry_boyPosted on 2008-04-11 at 11:52:41ID: 21337063

Good deal...

20120131-EE-VQP-002

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