PEAP, EAP-TLS & EAP-MD5

Hi
Just want to know is there any known problems or issues having PEAP, EAP-TLS & EAP-MD5 enabled on ACS Radius servers for wireless authentication?

Hello,
There is no problems excep you have to have CA server for certificates for both ACS and wireless users.
Regards,
Belal

Similar Messages

802.1x RADIUS with EAP-TLS/EAP-TTLS & Dynamic VLAN Assignment

Hello, My team is looking for switches supporting 802.1x authentication on either EAP-TTLS or EAP-TLS protocols with dynamic vlan assignment enabled for these. Looking at the data sheets of the Linksys desktop switches, I found only SLM224G4PS and SLM224G4S models to support EAP-TLS or EAP-TTLS. Am I right? Do they support Dynamic VLAN Assigment for either of those protocols? This is not explicitly mentioned in the data sheets, and I happen to find switches from other manufacturers that announce to support EAP-TLS/EAP-TTLS but no dynamic vlan assignment. Thank you for any help.

SLM switches do support 802.1x RADIUS with EAP-TLS/EAP-TTLS unlike the SRW switches which support MD5. But I don't think that they support Dynamic VLAN.

WLAN Security - EAP-TLS EAP-Identity exposed in the clear

Hi Guys,
As a well known point on eap-tls, is the eap-identity message from (lets say) a workstantion is exposed in the clear and any packet capture can pick this up.
How does this affect organisations deploying eap-tls and are there any recommend mitigation techniques to use?
If you are using eap-tls, and active directory, this machine name could be in the CN, SAN comparison from the Cisco ACS to AD DC so could be a problem? Not sure?
But the underlying certificate exchange is the real security method here correct? So should I not worry about this?
Many thx and kind regards,
ken

Hi Fella, Excellent response.
So, Couple of points here :
We use EAP-TLS and WPA2/AES
EAP-TLS = Authentication Layer only
WPA2/AES = Encrpytion Layer only
Is that correct?
Also, if correct
EAP-TLS Authentication Only
What does this authenticate in the certificate, and how?
All I know is that it is working and the client cert and ACS server cert are authenticating each other, and we have the ACS consulting the active directory DC with a CN, SAN or binary comparison
So the way I see it, there are two layers of authentication here
1st Layer
Laptop <---> ACS certificate verification/authentication (the two certs have some field in them that say they are linked) and are happy to proceed?
2nd Layer
The ACS-AD comparison, so if this field in the cert appears in an AD GPO, it allows access, if not, no eap-sucess messge is sent?
Can you clarify this as you have done a good job in explaing thus far?
Many thx indeed,
Ken

Cisco ISE - eap-peap and eap-tls

Hi,
Does anybody have an example of an ISE authentication policy where authentication requests coming from a WLC can be handled by TLS and PEAP?
I dont seem to get that working, I do however make the ISE application crash with my config which is not the idea.
If peap use this identity source, if tls use 'this certificate authentication profile'.
Thx

OK,
so I have just fired up my lab and I actually created an Identity Sequence which contained my AD & my certificate profile.
The authentication policy was allowing EAP-TLS & EAP-PEAP.
I then created 2 authorization rules, 1 for users and 1 for machines permitting access based on windows AD group.
What i found out was that the Windows 802.1x supplicant can only support 1 method of authentication, so if you want this to work properly, you need a different supplicant. I think Cisco do a more advanced one, not sure. You can then specifically choose that for machine auth you use EAP-TLS and for User Auth you use EAP-PEAP.
In my setup. Machine auth ONLY happens when the user logs off the machine and it is sitting at Ctrl+alt+del so that it can still talk to the network and get all relevant updates etc. I found that not only did the machine authenticate using EAP-PEAP, it also authenticated using TLS... I think that is because of the wireless settings I had. I chose EAP-PEAP for wireless settings
When the user then logs in, the user account authenticates using EAP-PEAP. I dont think you can authenticate both the logged on user and the machine at the same time. Not with the native windows supplicant anyway. Windows either sends authentication request for the user or the machine but not both.
Hope that helps.
Mario

EAP-TLS witch Cisco Secure ACS

Hi everyone,
we have implemented wpa/leap in our WLAN. We would use certificates for machine authentication. There is a Cisco Secure ACS Server 3.3 installed.
Is it possible to use the ACS self generated certificate without a CA ?
The examples I found on the web describes only the configuration with CSACS with Microsoft CA.
http://www.cisco.com/en/US/products/sw/secursw/ps2086/products_user_guide_chapter09186a0080205a6b.html
We use Cisco AP1231/AP1232 with 12.3.4JA.
I think for machine authentication we have to install a CA. Let me know, how you think about that issue.
Armin

There are no much options on Client side: MS PEAP, EAP-TLS, EAP-MD5. ACS version 3.3 can generate self-signed certificate (for itself) without the need to install separate CA server. So I'd recommend you to use MS PEAP (PEAP MS-CHAPv2) with self-signed certificate on ACS.

EAP TLS for machine and EAP PEAP for user

Hi forum
I am doing a design to use ISE to enforece dot1x for corporate machinese on both wired and wireless.
Due to the particular environment, we will need to use EAP-TLS for machines auth and on top of that use EAP-PEAP for user auth with windows credential and posture for full access.
Just wondering if anyone has done this before:
1. Will this work?
2. Any gottas?
3. what is the user experience like?
All machines are win7 based.
Thanks

You can not use the native supplicant for this. Cisco Anyconnect NAM will allow you to use this method. It is very simple to configure and deploy.
Tarik Admani
*Please rate helpful posts*

EAP-TLS or PEAP authentication failed during SSL handshake

Hi Pros,
I am a newbie in the ACS 4.2 and EAP-TLS implementation, with that being said. I face an issue during a EAP-TLS implementation. My search shows that this kind of error message is already certificate issue;However, I have deleted and recreated the certificate in both ACS and the client with the same result. I have deleted and re-install the certchain as well.
When I check my log in the failed attemps, there is what I found:
Date
Time
Message-Type
User-Name
Group-Name
Caller-ID
Network Access Profile Name
Authen-Failure-Code
Author-Failure-Code
Author-Data
NAS-Port
NAS-IP-Address
Filter Information
PEAP/EAP-FAST-Clear-Name
EAP Type
EAP Type Name
Reason
Access Device
Network Device Group
06/23/2010
17:39:51
Authen failed
000e.9b6e.e834
Default Group
000e.9b6e.e834
(Default)
EAP-TLS or PEAP authentication failed during SSL handshake
1101
10.111.22.24
25
MS-PEAP
wbr-1121-zozo-test
Office Networ
06/23/2010
17:39:50
Authen failed
[email protected]
Default Group
000e.9b6e.e834
(Default)
EAP-TLS or PEAP authentication failed during SSL handshake
1098
10.111.22.24
25
MS-PEAP
wbr-1121-zozo-test
Office Network
[email protected] = my windows active directory name
1. Why under EAP-TYPE it shows MS-PEAP not EAP-TLS? I did configure EAP-TLS....
2. Why sometimes it just shows the MAC of the client for username?
3. Why it puts me in DEFAULT-GROUP even though i belongs to a group well definy in the acs?
2. Secondly, When I check in pass authentications... there is what i saw
Date
Time
Message-Type
User-Name
Group-Name
Caller-ID
NAS-Port
NAS-IP-Address
Network Access Profile Name
Shared RAC
Downloadable ACL
System-Posture-Token
Application-Posture-Token
Reason
EAP Type
EAP Type Name
PEAP/EAP-FAST-Clear-Name
Access Device
Network Device Group
06/23/2010
17:30:49
Authen OK
groszozo
NOC Tier 2
10.11.10.105
1
10.111.22.24
(Default)
wbr-1121-zozo-test
Office Network
06/23/2010
17:29:27
Authen OK
groszozo
NOC Tier 2
10.11.10.105
1
10.111.22.24
(Default)
wbr-1121-zozo-test
Office Network
In the output below, it says that the user is authenticate and it puts the user in the right group with the right username, but the user never really authenticate. Maybe for the first few seconds when I initiate the connection.
Before I forget, the suppliant is using WIN XP and 802.1x is enable. I even uncheck not verify the server and the ACS under External User Databases, I did check ENABLE EAP-TLS machine authentication.
Thanks in advance for your help,
Crazy---

Any ideas on this guys?? In my end, i've been reading some docs... Things started to make sens to me, but I still cannot authenticate, still the same errors. One more thing that catch my attention now is the time it takes to open a telnet session to cisco device which has the ACS for auth server.
My AD(Active Direct) and the ACS server are local same subnet(server subnet). Ping to the ACS from my desktop which is in different subnet is only take 1ms. To confirm that the issue is the ACS server, I decided to use another server in remote location, the telnet connection is way faster than the local ACS.
Let's brain storm together to figure out this guys.
Thanks in advance,
----Paul

EAP-TLS PEAP FAIL DURING SSH HANDSHAKE

Hi Pros,
I am a newbie in the ACS 4.2 and EAP-TLS implementation, with that being said. I face an issue during a EAP-TLS implementation. My search shows that this kind of error message is already certificate issue;However, I have deleted and recreated the certificate in both ACS and the client with the same result. I have deleted and re-install the certchain as well.
When I check my log in the failed attemps, there is what I found:
Date
Time
Message-Type
User-Name
Group-Name
Caller-ID
Network Access Profile Name
Authen-Failure-Code
Author-Failure-Code
Author-Data
NAS-Port
NAS-IP-Address
Filter Information
PEAP/EAP-FAST-Clear-Name
EAP Type
EAP Type Name
Reason
Access Device
Network Device Group
06/23/2010
17:39:51
Authen failed
000e.9b6e.e834
Default Group
000e.9b6e.e834
(Default)
EAP-TLS or PEAP authentication failed during SSL handshake
1101
10.111.22.24
25
MS-PEAP
wbr-1121-zozo-test
Office Networ
06/23/2010
17:39:50
Authen failed
[email protected]
Default Group
000e.9b6e.e834
(Default)
EAP-TLS or PEAP authentication failed during SSL handshake
1098
10.111.22.24
25
MS-PEAP
wbr-1121-zozo-test
Office Network
[email protected]
= my windows active directory name
1. Why under EAP-TYPE it shows MS-PEAP not EAP-TLS? I did configure EAP-TLS....
2. Why sometimes it just shows the MAC of the client for username?
3. Why it puts me in DEFAULT-GROUP even though i belongs to a group well definy in the acs?
2. Secondly, When I check in pass authentications... there is what i saw
Date
Time
Message-Type
User-Name
Group-Name
Caller-ID
NAS-Port
NAS-IP-Address
Network Access Profile Name
Shared RAC
Downloadable ACL
System-Posture-Token
Application-Posture-Token
Reason
EAP Type
EAP Type Name
PEAP/EAP-FAST-Clear-Name
Access Device
Network Device Group
06/23/2010
17:30:49
Authen OK
groszozo
NOC Tier 2
10.11.10.105
1
10.111.22.24
(Default)
wbr-1121-zozo-test
Office Network
06/23/2010
17:29:27
Authen OK
groszozo
NOC Tier 2
10.11.10.105
1
10.111.22.24
(Default)
wbr-1121-zozo-test
Office Network
In the output below, it says that the user is authenticate and it puts the user in the right group with the right username, but the user never really authenticate. Maybe for the first few seconds when I initiate the connection.
Before I forget, the suppliant is using WIN XP and 802.1x is enable. I even uncheck not verify the server and the ACS under External User Databases, I did check ENABLE EAP-TLS machine authentication.
Thanks in advance for your help,
Crazy---

I had this message recently. The first issue I found was that the username entered into the laptop was not correct (I had djohnson, need to have DJohnson)
The second issue I had was that my AP's were not authenticating to my WDS access point. I had turned off LEAP on my ACS server by accident causing the WDS authentication to fail. Once I turned this back on, my AP's authenticated to my WDS device and my users authenticated to the AP's.
Otherwise, the meaning of this is that the certs are not matching up correctly with the server either due to expiered certs, incorrect cert type on the users machine or incorrect information in the cert.
Hope this helps.

EAP-TLS and EAP-PEAP Clients

Hi guys
I have installed a dot.1x solution for a customer using ISE. The ip phones have certificate from CUCM server. In the ISE a wired-dot.1x with eqp-tls enabled policy is configured so that when ip phones or PC connect to network they get authenticated using EAP -TLS. I have required certificates imported on pc's and ISE server. That part works absolutely fine.
Now I have been asked to configure EAP-PEAP for video end points which doesn't support EAP -TLS.
The endpoints are configured with a username and password. The credentials are created in ISE server.
I create a second policy for wired dot.1x with EAP - PEAP enabled
The problem I am hitting is that if the PCM and phone policy is on top. The phone and pc gets authenticated. But video endpoint doesn't. I get authentication error messages saying certificate expected but received credentials.
When I move the video end point authentication rule above the pc and phones. The video end points get authenticated successfully. But PC and phone authentication breaks. The error message I receive is saying usrname and password expected but received a certificated based authentication.
Has anyone seen this type of scenario ? Any idea how to make EAP -PEAP and EAP TLS authentication work together ?
Thanks in advance.
Sent from Cisco Technical Support iPad App

Hi,
There are two ways you can tackle this with ISE, I will start with the easiest one and then the other one to cover your options.
You need to create an identity store sequence. This allows you to mix both certificate based and password based authentications, keep in mind that you can only map one Certificate authentication Profile in when using identity store sequences. More informations about configuring this is provided below:
http://www.cisco.com/en/US/docs/security/ise/1.1/user_guide/ise_man_id_stores.html#wp1117203
The next option would be to use the authentication policy configuration to map the patterns of the username (if common with your video endpoints), to forward their requests to the internal identity store. You can use regex to make this work and you can check for the radius username attribute.
Thanks,
Tarik Admani
*Please rate helpful posts*

EAP-TLS & ACE Appliance "EAP-TLS or PEAP authentication failed"

Hello - I have a version 3.2 of the ACS appliance and I am trying to set up a successful test of EAP-TLS. I have a W2K server for a CA and I believe I have the certificate install properly. However, I get the "EAP-TLS or PEAP authentication failed during SSL handshake" error message in my failed attempts log. The troubleshooting document tells me to look at the CSAuth.log file but I can't seem to find in on the ACS Appliance.
Does anyone have any ideas how to troubleshoot this problem with the appliance?

If the client's certificate on the ACS is invalid (which depends on the certificate's valid "from" and "to" dates, the server's date and time settings, and CA trust), then the server will reject it and authentication will fail. The ACS will log the failed authentication in the web interface under Reports and Activity > Failed Attempts > Failed Attempts XXX.csv with the Authentication Failure-Code similar to "EAP-TLS or PEAP authentication failed during SSL handshake." If the ACS rejects the client's certificate because the ACS does not trust the CA, the expected error message in the CSAuth.log file is similar to the following.
AUTH 06/04/2003 15:47:43 E 0345 1696 EAP: ProcessResponse:
SSL handshake failed, status = 3 (SSL alert fatal:unknown CA certificate)If the ACS rejects the client's certificate because the certificate has expired, the expected error message in the CSAuth.log file is similar to the following.
AUTH 06/04/2005 15:02:08 E 0345 1692 EAP: ProcessResponse:
SSL handshake failed, status = 3 (SSL alert fatal:certificate expired)
http://www.cisco.com/en/US/products/sw/secursw/ps2086/products_configuration_example09186a00801df0ea.shtml

EAP-TLS or PEAP authentication failed due to unknown CA certificate during SSL handshake

Hi All ,
             I am trying to test EAP_TLS authentication on acs 4.2.1.15 running on Appliance 1120 , I have installed my server certficate along with CA certficate on my appliance box , I have enabled features of EAP_TLS under golbal authentication setup .
             I have downloaded client supplicant certficate file for my windows XP machine .
When i tried to authenticated i am finding following error message under failed attempts(EAP-TLS or PEAP authentication failed due to unknown CA certificate during SSL handshake) on my acs appliance box .
Under certficate revocation list , I have forced my CA as CRL in use . Attached snap shot of all .
Suggest me whether i need to enable all corresponding CA certficate undercertficate trust list , Kindly let me know were i am doing wrong on this ..

Hello,
I am NO expert on certificates but I have seen your error dozens of times from wireless clients on my Cisco ACS 4.2 Radius server.
Through trial and error I wrote up this procedure for our Helpdesk for installing certs in Windows XP and Windows 7. These steps haven't failed me yet and the Helpdesk doesn't bother me as much anymore so see if this helps you:
-          Manually install the Global CA under BOTH Trusted Root Certification Authorities\Certificates AND Intermediate Certification                      Authorities\Certificates
-          Manually install the Intermediate CA under JUST the Intermediate Certification Authorities\Certificates
-          Delete the wireless network from the computer
-          REBOOT!!
-          Open the Microsoft Management Console, “mmc”.
-          Go FILE\Add Remove SnapIn. Select Certificates ..
-          If promoted, do it for “My User Account”.
-          Make sure the certificates are where you put them.
-          If you see any of these exact certificates out of place in either Trusted Root Certification Authorities\Certificates or Intermediate Certification                      Authorities\Certificates, remove them.
-          Redo wireless network setup again
I hope this helps you.
Mike

EAP-TLS or PEAP authentication failed during SSL handshake to the ACS serve

We are running the LWAPP (2006 wlc's and 1242 AP's) and using the ACS 4.0 for authentication. Our users are
experiencing an issue, where they are successfully authenticated the first time, however as the number of them is increasing, they're starting to drop the connections and being prompted to re-authenticate. At this point, they are not being able to authenticate again.
We're using PEAP for the authentication and Win XP SP2 clients as the supplicants. The error message that we are seeing on the ACS for that controller is "EAP-TLS or PEAP authentication failed during SSL handshake to the ACS server"...Not sure if this error msg is relevant since we have other WLC's that are working OK and still generating the same error msg on the ACS...
Thanks..

Here are some configs you can try:
config advanced eap identity-request-timeout 120
config advanced eap identity-request-retries 20
config advanced eap request-timeout 120
config advanced eap request-retries 20
save config

EAP-TLS or PEAP authentication failed during SSL handshake error

I have 2 Windows 2003 ACS 3.2 servers. I am in the process of upgrading them to ACS 4.0. I am using them for WPA2/PEAP wireless authentication in a WDS environment. I recently upgraded one to ACS 4.0 and ever since that time some (not all) of my Windows XP clients have started to not be authenticated and logging the error "EAP-TLS or PEAP authentication failed during SSL handshake" on the ACS 4.0 server. During the upgrade (which was successful) I did change the Certificate since the current one was going to expire November 2007.
The clients that do not authenticate on the ACS 4.0 server I can point to the ACS 3.2 server and they successfully authenticate there. I am able to resolve the issue by recreating the Windows XP PEAP profile for the wireless network and by getting a new client Cert. But, I have a couple of questions:
Is the "EAP-TLS or PEAP authentication failed during SSL handshake" error due to the upgrade to ACS 4.0 or to the fact that I changed the Certificate, or both?
Can this error ("EAP-TLS or PEAP authentication failed during SSL handshake") be resolved without me touching every Windows XP client (we have over 250+)?
Thanks for the help

My experience suggests that the problem is the certificate.
I'm running ACS 3.3.
I received the same error message when my clients copied the certificate to the wrong location, or otherwise did not correctly follow the provided instructions.
Correctly following the instructions led to a successful connection and no more error message.

EAP-PEAP and EAP-TLS on same switched network

Hello,
I'd like to enable both EAP-PEAP and EAP-TLS on the same network to support 802.1x authentication. The reasons are because of historical things i.e. 'older' devices use PEAP and newer devices use TLS. Over time all will be using TLS, but for now both will the there.
The AAA server is a Cisco ASC (4.2 or 5.1 - don't know yet)
I've not tested this or so, but I don't think this will be an issue....because from a switch point of view, it is just passing EAP traffic to teh Radius and so the required services need to be made available on the Radius server...is that a correct assumption?
Thanks,
Guy

You are right Guy, the switch just as act as an termediary device. It just passes EAPOL packet between the ACS server and client, and waits till the ACS server authenticate the client(internal DB, or external DB= AD, LDAP). You just need to enable EAP/TLS, MS-CHAP and MS-CHAPv2 for PEAP in the ACS server. Last make sure that your certificates at both side are valid and sign by the CA.
Good Luck,
--Jean Paul

IBNS with two groups of XP Machines, one PEAP-MSCHAPv2 & one EAP-TLS

Hello,
I'm planning to implement a IBNS network. We have two groups of XP Machines. One group has machine certs and we're planning to check their certs using EAP-TLS. The second group of machines is managed by other departments, each having their own Active Directory, and configured with PEAP-MSCHAPv2. I'm not very familiar with this kind of setup, so hints are highly appreciated.
1. Can I assume that, when properly configured, we can differentiate the authorizations per group (for exemple, at least two VLANs one for group 1 and another one for group 2 - I must at least seggregate the users per group and can't mix them in the same environment, since they belong two different departments).
2. For the first group, no big issue. I can check against my central AD. For the users of the second group, since they can come from different departments, each having its own AD, can I differentiate them, by any means, to know which AD I'll have to query? Or do I have to query only one single AD? Is it required that all the users of group 2 belong to the same domain?
Thanks in advance for your help.

Hello,
I'm planning to implement a IBNS network. We have two groups of XP Machines. One group has machine certs and we're planning to check their certs using EAP-TLS. The second group of machines is managed by other departments, each having their own Active Directory, and configured with PEAP-MSCHAPv2. I'm not very familiar with this kind of setup, so hints are highly appreciated.
1. Can I assume that, when properly configured, we can differentiate the authorizations per group (for exemple, at least two VLANs one for group 1 and another one for group 2 - I must at least seggregate the users per group and can't mix them in the same environment, since they belong two different departments).
2. For the first group, no big issue. I can check against my central AD. For the users of the second group, since they can come from different departments, each having its own AD, can I differentiate them, by any means, to know which AD I'll have to query? Or do I have to query only one single AD? Is it required that all the users of group 2 belong to the same domain?
Thanks in advance for your help.

PEAP, EAP-TLS & EAP-MD5

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