Cisco VPN :: All Remote Wireless IPSec Remote Clients Fail Connecting To ASA 5500

Sep 12, 2012

We have two ASA 5500 series Firewalls running 8.4(1).  One in New York, another in Atlanta.They are configured identically for simple IPSecV1 remote access for clients.  Authentication is performed by an Radius server local to each site.
 
There are multiple IPSec Site-to-Site tunnels on these ASA's as well but those are not affected by the issues we're having.First, let me start with the famous last words, NOTHING WAS CHANGED.
 
All of a sudden, we were getting reports of remote users to the Atlanta ASA timing out when trying to bring up the tunnel.  They would get prompted for their ID/Password, then nothing until it times out.Sames users going to the NY ASA are fine.After extensive troubleshooting, here is what I've discovered. Remote clients will authenticate fine to the Atlanta Firewall ONLY IF THEY ARE USING A WIRED CONNECTION.
 
If they are using the wireless adapter for their client machine, they will get stuck trying to login to Atlanta.These same clients will get into the New York ASA with no problems using wired or wireless connections.Windows 7 clients use the Shrewsoft VPN client and Mac clients use the Cisco VPN client.  They BOTH BEHAVE the same way and fail to connect to the Atlanta ASA if they use their wireless adapter to initiate the connection.
 
Using myself as an example.
 
1. On my home Win 7 laptop using wireless, I can connect to the NY ASA with no issues. 
 
2. The same creditials USED to work for Atlanta as well but have now stopped working.  I get stuck until it times out.
 
3. I run a wire from my laptop to the FiOS router, then try again using the same credentials to Atlanta and I get RIGHT IN.
 
This makes absolutely no sense to me.  Why would the far end of the cloud care if I have a wired or wireless network adapter?  I should just be an IP address right?  Again, this is beyond my scope of knowledge.We've rebuilt and moved the Radius server to another host in Atlanta in our attempts to troubleshoot to no avail.  We've also rebooted the Atlanta Firewall and nothing changed.
 
We've tried all sorts of remote client combinations.  Wireless Internet access points from different carriers (Clear, Verizon, Sprint) all exhibit the same behavior.  Once I plug the laptops into a wired connection, BAM, they work connecting to Atlanta.  The New York ASA is fine for wired and wireless connections.  Same with some other remote office locations that we have.
 
Below I've detailed the syslog sequence on the Atlanta ASA for both a working wired remote connection and a failed wireless connection.  At first we thought the AAA/Radius server was rejecting us but is shows the same reject message for the working connection.  Again, both MAC and Windows clients show the same sequence.Where the connection fails is the "IKE Phase 1" process.

-------------------------------------------------------------------------------------------------------------------------
WORKING CONNECTION
-------------------------------------------------------------------------------------------------------------------------
 %ASA-6-713172: Automatic NAT Detection Status: Remote end is|is not behind a NAT device This end is|is not behind a NAT device
NAT-Traversal auto-detected NAT.
 %ASA-6-113004: AAA user aaa_type Successful: server = server_IP_address, User = user
 %ASA-6-113005: AAA user authentication Rejected: reason = string: server = server_IP_address, User = user

[code]...

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[Code].....

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[code]..... 

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[code]....

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--------------------------------
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[code]....

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