Question

Site to Site VPN Connection with 2 CISCO ASA 5505

Asked by: fluidiqsit

I currently have two CISCO ASA devices both setup to allow local Internet access and Remote Access.  Now I would like to add a site to site vpn tunnel between the two ASA devices and have tried multiple attempts to add the site to site with no success.  The code attached is base without any site to site configuration (just base configuration w/ Remote VPN Access).

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Asked On
2009-06-04 at 10:40:48ID24464508
Tags

Site to Site VPN

,

CISCO ASA

Topics

Virtual Private Networking (VPN)

,

Network Routers

,

IPSec Security Protocol

Participating Experts
3
Points
500
Comments
13

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Answers

 

by: touellette83Posted on 2009-06-04 at 11:11:00ID: 24549700

Add the Following to your ASA's for the VPN...

-Tim

-SITE A-
-----------
access-list siteb_vpn extended permit ip 10.0.0.0 255.255.255.0 192.168.72.0 255.255.255.0
access-list nonat extended permit ip 10.0.0.0 255.255.255.0 192.168.72.0 255.255.255.0
 
crypto map outside_map1 1 match address siteb_vpn
crypto map outside_map1 1 set peer 66.211.240.149
crypto map outside_map1 1 set transform-set ESP-3DES-SHA
crypto map outside_map1 1 set security-association lifetime seconds 28800
crypto map outside_map1 1 set security-association lifetime kilobytes 4608000
 
tunnel-group 66.211.240.149 type ipsec-l2l
tunnel-group 66.211.240.149 ipsec-attributes
 pre-shared-key "your PSK here"
 
 
 
-SITE B-
---------
access-list sitea_vpn extended permit ip  192.168.72.0 255.255.255.0 10.0.0.0 255.255.255.0
access-list nonat extended permit ip 192.168.72.0 255.255.255.0 10.0.0.0 255.255.255.0
 
crypto map outside_map1 1 match address sitea_vpn
crypto map outside_map1 1 set peer 66.211.240.99
crypto map outside_map1 1 set transform-set ESP-3DES-SHA
crypto map outside_map1 1 set security-association lifetime seconds 28800
crypto map outside_map1 1 set security-association lifetime kilobytes 4608000
 
 
tunnel-group 66.211.240.99 type ipsec-l2l
tunnel-group 66.211.240.99 ipsec-attributes
 pre-shared-key "your PSK here"
                                              
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by: tligdaPosted on 2009-06-04 at 11:13:53ID: 24549732

 

by: fluidiqsitPosted on 2009-06-04 at 11:43:22ID: 24550035

Tim - I added the code and although it looks good I am unable to ping through the site to site VPN any suggestions?  Attached is the updated configs.

 

by: touellette83Posted on 2009-06-04 at 11:55:12ID: 24550156

Is the VPN Tunnel comming up? Can you do a "show isakmp" and post the output?

-Tim

 

by: fluidiqsitPosted on 2009-06-04 at 12:10:03ID: 24550332

Same on both ends doesn't look like its up.  What else should we try
.......................................................................

Result of the command: "show isakmp"

There are no isakmp sas

Global IKE Statistics
Active Tunnels: 0
Previous Tunnels: 0
In Octets: 0
In Packets: 0
In Drop Packets: 0
In Notifys: 0
In P2 Exchanges: 0
In P2 Exchange Invalids: 0
In P2 Exchange Rejects: 0
In P2 Sa Delete Requests: 0
Out Octets: 0
Out Packets: 0
Out Drop Packets: 0
Out Notifys: 0
Out P2 Exchanges: 0
Out P2 Exchange Invalids: 0
Out P2 Exchange Rejects: 0
Out P2 Sa Delete Requests: 0
Initiator Tunnels: 0
Initiator Fails: 0
Responder Fails: 0
System Capacity Fails: 0
Auth Fails: 0
Decrypt Fails: 0
Hash Valid Fails: 0
No Sa Fails: 0

Global IPSec over TCP Statistics
--------------------------------
Embryonic connections: 0
Active connections: 0
Previous connections: 0
Inbound packets: 0
Inbound dropped packets: 0
Outbound packets: 0
Outbound dropped packets: 0
RST packets: 0
Recevied ACK heart-beat packets: 0
Bad headers: 0
Bad trailers: 0
Timer failures: 0
Checksum errors: 0
Internal errors: 0

 

by: touellette83Posted on 2009-06-04 at 12:24:38ID: 24550495

It looks like the tunnel is not comming up... you should see something like this (example fro my ASA) in place of "ther is no isakmp sas"

dc-asa-vpn# show isakmp
   Active SA: 6
    Rekey SA: 0 (A tunnel will report 1 Active and 1 Rekey SA during rekey)
Total IKE SA: 6

1   IKE Peer: xxx.xxx.xxx.xxx
    Type    : L2L             Role    : responder
    Rekey   : no              State   : MM_ACTIVE
2   IKE Peer: xxx.xxx.xxx.xxx
    Type    : L2L             Role    : responder
    Rekey   : no              State   : MM_ACTIVE

A couple things...

1) can you ping the opposite peer address from either ot both ASA?
2) while trying to bring up the tunnel run a debug to gather more info on what's happening...  

"debug crypto isakmp 150"

 

by: fluidiqsitPosted on 2009-06-04 at 15:18:56ID: 24551911

Tim - it still shows the same output and debug does not show any activity.  Any suggestions?  It seems like the tunnel does not even initialize

 

by: touellette83Posted on 2009-06-04 at 22:24:49ID: 24553536

'terminal monitor' 1st then do the debug....


 

by: JFrederick29Posted on 2009-06-05 at 05:57:12ID: 24555882

You can only have one crypto map bound to the interface so you need to add the site to site policy to the "mymap" map.

no crypto map outside_map1 1 match address SITEB_vpn
no crypto map outside_map1 1 set peer 66.211.240.142
no crypto map outside_map1 1 set transform-set ESP-3DES-SHA

crypto map mymap 1 match address SITEB_vpn
crypto map mymap 1 set peer 66.211.240.142
crypto map mymap 1 set transform-set ESP-3DES-SHA

On SiteB:

no crypto map outside_map1 1 match address SITEA_vpn
no crypto map outside_map1 1 set peer 66.211.240.90
no crypto map outside_map1 1 set transform-set ESP-3DES-SHA

crypto map mymap 1 match address SITEA_vpn
crypto map mymap 1 set peer 66.211.240.90
crypto map mymap 1 set transform-set ESP-3DES-SHA

 

by: fluidiqsitPosted on 2009-06-05 at 10:11:10ID: 24558343

Thanks J - I modified as instructed.  Still no luck though.  Here's the code now updated.  See anything out of place.

 

by: JFrederick29Posted on 2009-06-05 at 10:14:01ID: 24558369

Looks like you mistyped the crypto map name on SiteB:

You have this:

crypto map myap 1 match address SITEA_vpn
crypto map myap 1 set peer 66.211.240.90
crypto map myap 1 set transform-set ESP-3DES-SHA

Should be:

crypto map mymap 1 match address SITEA_vpn
crypto map mymap 1 set peer 66.211.240.90
crypto map mymap 1 set transform-set ESP-3DES-SHA

 

by: JFrederick29Posted on 2009-09-19 at 07:34:24ID: 25373165

I am confident that my solution resolved the issue.  Hopefully fluidiqsit will confirm.

20120131-EE-VQP-002

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