Cisco AAA/Identity/Nac :: How Certificates Work When Using PEAP On ACS 5.2
Apr 23, 2013
how the certificates work when using PEAP on ACS 5.2.Currently we have clients which are Cisco wireless IP phones that are using the ACS server(s) for authentication to the wireless network. The phones are configured to use PEAP with server validation enabled. The phones have a Godaddy root certificate, and Godaddy intermediate certificates installed on them, (in addition they have all the certs that are on the phone by default). On the ACS server there is a certificate that is signed by Godaddy. This was creating doing the CSR process etc...
So from what I understand, because all the phones are set up to validate the server certificate, they require the public root certs and the intermediate certs that are installed on them, in order to validate the private cert that is on the ACS server. The private certificate (the one signed and issued by Godaddy), expires the middle of next year (2014) (a little ways off I know, but it is never too early be concerned about stuff). When we go to get a new private certificate for the ACS servers (or get a renewal) and when we install this new signed certificate onto the ACS servers…will all the clients still trust this new certificate, and everything will continue to work smoothly? Or will the clients all need to have new root certs installed, and new intermediate certificates installed? From what I can gather I think the first scenario should be the case, because the root certs and intermediate certs are there to trust certs that are signed by Godaddy, so as long as the new private certificate is signed by Godaddy everything should be okay.
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Apr 3, 2012
I have been trying to figure out for days now how to get Windows XP/Windows 7 and Apple iPads to connect to a broadcasted SSID and authenticate with PEAP without getting prompted to verify a certificate that exists on ACS.
In Windows 7, I get a window that says the connection attempt could not be completed and get a warning that the certificate could not be validated. If I manually configure a wireless connection and specify PEAP to accept my trusted root certificate authority (in the default list), it doesn't prompt but having users do this is not acceptable and more work than to just verify when prompted. I have no control over the devices connecting so I can't push anything down using GPOs.
For the iPad, I get a similar message that the certificate authority can't be verified and you have to accept.
For the certs, I have tried GoDaddy and Starfield. How to get this working without getting prompted to verify/validate a certificate authority? If so, what cert are you using? I have the intermediate certs installed in ACS and Windows and iPads see them because as soon as I delete, the screen that pops up changes to my actual cert.
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Sep 25, 2011
I am trying to setup PEAP authentication for wireless users but I got stuck at place where I have single ssid and users are store in different identity stores like some will be using their active directory and some are locally created users on ACS. I created separate service for wireless authentication and under that I am unable to create rule to differentiate them with identity stores. any idea how to achieve this.
I tried creating identity selection based on role but it does not work as for protocol like radius.peap,ms-chap ACS does not look for another identity store once user not find in an identity stores.
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Aug 8, 2011
I am delving into the world of Certificates and the ASA. I am having the HARDEST time grasping this though. I've poured over Cisco whitepapers, been reading through books and things just aren't solidifying in my head. So my question is, how do Certificates for SSL work on the ASA? Where does the data transmit and how does an ASA talk to a CA and User for things?
Lets do this basic topology for the discussion:
End User------SSL VPN---> ASA--->Internal CA
So in theory we are supposed to create a certificate and install it on the ASA and then set the outside interface to trust that cert?
How do identity certs and root certs also work out on the ASA? I have instructions that pretty much say
Create RSA key
Create new trustpoint
cry ca auth newtrustpoint
cry ca enroll newtrustpoint
cry ca import ?
So what are all of these steps specifically doing? Also in ASDM it shows a normal Certificate and an Identity Certificate. I can't really figure out the difference between the two. Does one cert talk to the CA and the other identify the ASA to the CA?
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Sep 11, 2011
Any good guide for configuring PEAP with Machine Authentication to allow for domain login?This is a clean install on a new 5.2 install.We are moving from 4.X to 5.2 and i want to make sure i dont miss anything.
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Aug 19, 2012
Cisco 5508 wireless controllerCisco ACS 5.1LDAP connection I have setup the wireless controller to do RADUIS authentication with the ACS 5.1 using LDAP. The setup is currently working, Brief info below on setup.
I setup the PC client to use WPA2-Enterprise AES and authentication method CISCO PEAP. When I connect to the SSID this will prompt for a username and password. I will enter in my AD details and the ACS with the LDAP connection will authenicate and on the network I go.
Now I want to add machine authentication with CERTIFICATES, each laptop and pc in our network has CA certificates installed.
way that I can add these certificates into the ACS 5.1 so I pretty much want to import them into the ACS. Once they are imported inside I want the ACS to check that the certificates are on the PC and then prompt for the AD username and password, and only once it meets these two conditions it allows the workstation onto the network.So it will be a two form authentication one with certificates and the other ldap.
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Jan 31, 2012
I have generated request and our CA server gave us two files, one is certificate from CA itself, one is the certificate CA created for the ACS. I used the "Bind CA Signed Cerficate" under "local certificated"Option to bind the latter. it shows successful.and a web access from any pc will give you error info, "that the security certificate presented by this website was issued for a different website's address." And all the while I dont know how to deal with the other file, which is "Internal CA certificates" I was try to use the first option import server option, but it seems not right,
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Feb 10, 2011
I want to use multiple cert (enterprise certs and verisign cert) for authentication in wireless.Users that have their computer in the domain should use EAP-TLS and PEAP (verisign) are for users in the domain but on non-domain computers.I can only enable one certificate in system adminstration->local server certificates-> local certificates to use EAP.I have installed both enterprise and verisign cert in the CA store in User and Identy store and enbled the enterprise cert for EAP-TLS.The EAP-TLS connection works fine when the enterprise cert is enabled for EAP (in local certificates) but PEAP does not. If I enable EAP on the verisign cert in local certificates the enterprise cert get EAP disabled and that authentication stops working av PEAP starts working.
Is the ACS5.2 only able to have one certificate enabled at the time for EAP?
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Feb 25, 2010
I have a Cisco WLC talking to a ACS 4400 version 5.1 which in turn talks to Active Directory.Ive been trying to get 802.1x for wireless clients going, I have a cert on the ACS from verisign on the box but when users try to sign in they get 12309 PEAP handshake failed in the ACS RADIUS log.The cert was exported and placed directly on the testing laptop and at one point it all worked. I stepped away from it for 2 weeks to get a new internal CA built on a windows box, now coming back to it with the intent of issuing new certs to the ACS from the internal CA and thought I would check it to make sure all was good, but its not.Google doesn’t return happy results for “12309 PEAP handshake failed”, I opened a TAC case on it and they took my cert to their lab. Haven’t heard back.
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Oct 20, 2012
We are currently evaluating ISE and I am stuck with the PEAP authentication (with Server side Cert).Our current setup consists of two 5508 controllers, 30+ access point. For authentication we are using PEAP with (server side Cert). We have an IAS server which is also acting as a CA server. We are using Cisco’s NAM as a supplicant on Windows XP & 7 workstations. I would like to use ISE for authentication. I would like to use PEAP with Server side Cert (similar setup like IAS). I want ISE to perform the same function in addition to profiling etc.....
I was able to integrate ISE with Active Directory but could not get it working with PEAP (server side Cert). I would also like to know if they used Microsoft’s CA server or Open SSL CA server or a third party CA server (Go Daddy, VeriSign etc.)Can you we ISE as a CA server just the way we used Microsoft’s IAS Server as a CA Server?
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Oct 31, 2010
I replaced an ACS certificate that had been installed as follows:
1. Generate CSR file and private key file, then send CSR to GeoTrust (Key length: 2048 and Digest to sign with SHA1)
2. GeoTrust send me a certificate. Issued by "GeoTrust SSL CA".
3. Install the certificate on the ACS. Restart ACS service.
4. ACS Certification authority setup. Issued by "VeriSign Class 2 Public Primary Certification Authority - G3"
5. Edit certificate trust list and select "VeriSign Class 2 Public Primary Certification Authority - G3" as trusted.
6. Enable EAP-TLS, then restarted the ACS service. The problem is when i try to enable EAP i get the error msg:Failed to initialize PEAP or EAP-TLS authentication protocol because CA certificate is not installed. Install the CA certificate using "ACS Certification Authority Setup" page.I searched on cisco and it said to disable the CSA, but in fact there is no CSA installed on this server.
OS: Win 2003 sp2Cisco ACS: Release 4.2(0) Build 124
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Apr 29, 2012
We are deploying ACS 5.2 to replace our ACS 4.2 in production. I have two wireless networks setup as WPA2-Enterprise. One points at the ACS 4.2 and the other at the ACS 5.2. Both use the same SSL certificate with the same CN. Both authenticate Windows 7 clients. However, Windows 8 CP will only authenticate to the ACS 4.2 and not to ACS 5.2. The error it gives is:
11051 Radius packet contains invalid state attribute
It also shows no authentication method (most of the time).
Occasionally, I get a request that actually shows an authentication method of PEAP (EAP-MSCHAPv2) which is what it should be. On those requests, I get error:
24444 Active Directory operation has failed because of an unspecified error in the ACS.
Both ACs 4.2 and ACS 5.2 are pointed at the same Windows AD source.
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Jun 7, 2012
I have a Cisco 4506 With IOS 12.2 54SG1
Iam new on Acs 4.2 and i want to use Certificates to authenticate my windows XP Client and Igels.
On Windows Xp i selected : IEEE 802.1X Authentication enable EAP (Peap)
But i dont understand the Certification of ACS 4.2.
I generated a Self-Signed Certificate. Is this right ? and under installed Certificates the Certificate Status is okay.
Do i have to create for each windows Machine one user Account under user-Setup to authenticate the Machine?
Where do Windows Xp know whitch Certificate he have to take ?
I configures the Switch on Global Configuration like this:
aaa authentication login default group tacacs+ enable
aaa authentication enable default group tacacs+ enable
[Code].....
Iam triying to configure ist szenario till 4 days and it still dont work.. On Windows i Only get the Error" authentication failed" on the Switch the same : dot1x : Authfailed
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Sep 25, 2011
I'm looking for samples about anyconnect 2.x with PKI authentication through ASA 8.x and ACS 5.2.The CA could be a internal Microsoft CA.
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Jan 10, 2012
When I tried to import the file, there are two lines there, One is Certificate file, the other is for "Private Key File".
My question for you is, is this the private key of CA? My understanding has always been that the private key stays in CA only, not going to any other devices.
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Apr 25, 2010
A PC with a machine cert gets connected to a switch running 802.1x. The switch uses EAP with .1x to query PC, handing this off to ACS, that bit I'm ok with. The ACS needs to query the CA server to authenticate the PC, its this process I'm not sure about.
Reading the documentation I think that I need to configure LDAP between the ACS and the CA, which is running on 64-bit 2008 server. But, ACS SE remote agent is 32 bit only.
Is this correct, if so how do I get ACS SE to communicate with a 64-bit 2008 CA server?
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Apr 29, 2013
Getting ready to order a SSL Certificate for my newly installed ACS 5.4 and before I did that i want to verify if ACS 5.4 supports Wildcard SSL's.
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Apr 18, 2011
I need this SSL certficate installation on my acs appliance 1120 for PEAP clients.I have exported SSL server certficate from my old acs 3.3 server which is under acscertstore folder issued by CA vendor . I need to reuse this same SSL certificate on my acs appliance .ACS appliance certficate setup requires following two certificate to be installed for PEAP clients authentication
1) Server Certificate
2) CA certificate
Server Certificate : For server certifcate , I have my old certificate which is exported from my old acs 3.3 server , when i tried to download my server certficate via ftp server on my acs appliance , its looking for private key & private key file .Private key & file is generated intially on CSR request when this server certificate is requested to CA vendor for my old acs 3.3 . I dont know the private key password . If i need private key & file , then i need to generate new CSR from my acs appliance and i need to submit this CSR output to my CA vendor to generate new SSL server certificate .which is something like new server certificate request .CA certficate : For CA certficate , when i open my existing SSL certificate under detials tab in CRL distribution point , i could see below URL . whn i open this URL it giving certificate revocation list . [1]CRL Distribution Point.
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Sep 17, 2012
I'm working on task to update the SSL certificate for an application. steps to upgrade the SSL, stuffs need to be checked before and after the installation and how to verify the new certificates.
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Feb 21, 2012
We have ACS 5.3, and trying to set up sftp backup on freesshd server. SSH connection works, but ACS cannot copy backup file to sftp server, we get following errors:
Acs.MGMT.ACSVIEW Backup failed: CARS_XM_SSH_CONNECT : -306 : SSH connect error
FTP backup works fine.
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Jun 18, 2012
I am trying to get the ACS 5.3 to work with NCS but cannot make it work correctly. url...But this does not show how the ACS referencing AD groups would work when determining which custom attributes to use.
On the ACS 5.3 i have set up the following .The ad is working and in Users and identity stores/External identity stores/Active Directory then my AD test works fine.I have set up the Users and Identity stores/Identity Groups with appropriate ip s.I have configured the Network Device Groups/Network Devices and AAA Clients with the ip address and Authenication optionsA.In Policy Elements/Authorisation and Permissions/device administration/shell profiles.I have creeated a shell profile called network shell pro which das a common tasks of def priv = 0 and max priv = 15
Now i can get into the NCS but i do not see any of the administration buttons on NCS - so this means the custom attributes are not working.i shouldnt need a user for this on the ACS as its using AD.
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Mar 8, 2012
I have several 2950 switches that I cannot get to work with TACACS. I'm using the same config for these that I am using for other cisco switches. [code]
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May 18, 2012
I am trying to install ACS 5.0 on workstation, however once the install finsihes it reboots and I enter the Linux bash command line rather than the Cisco CLI.
Note - this is now fixed. I followed the steps here to install ACS 5.0 on VMware Workstation 7: url...
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Feb 21, 2013
I have an issue about ACS v5.3 Appliance.I have an ACS v 5.3 wo authenticate wireless users, together with a cisco wlc. One profile is to corporate users and the second profile is to guest.
The corporate users should authenticate with Active Directory and the guest with WLC. Guest users should authenticate with the ACS Local Database. I have configurate two service selection policy that match with protocol Radius. The first rule is to users of Active Directory and the second is to users in
the Local Database of ACS.When i try to authenticate users with active directory is OK, but when try to authenticate users with Local Database (Guest Portal) the ACS try to find the
the internal user in the Active Directory, because math the first rule, and the second profile can not authenticate.When I change the order, first the Rule of internal users and second the rule of users of Active Directory, the internal users can authenticate in to ACS, but
the users in the Active Directory can not authenticate.I think my ACS only authenticate the first rule of radius to Active Directory, no two rules of radius in the same time. Or maybe exists an issue in OS of the ACS.The authentication by separately is OK.
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Apr 6, 2011
I have win 2008 server as DC, i have installed acs 4.2 on menber server (win 2003) , but it doesn't work, how to let this one work.
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Nov 25, 2012
As observed ACS 5.x " Change Password on Next Login" Feature does not work with SSH Clients ( tried with X-sheel, Secure CRT, Putty etc...) , however through telnet session to IOS devices, users can change their password on their next login.
1: on ACS 5.x i create a new user & Set " Change password on NExt Login" option.
2: Logged into the device through Telnet & Password can be changed after i authenticate successfully. however the same is not happening when i login to the devices through SSH.
is it because of the fact that SSH is encrypted session ?
Because changing password through a telnet session is not accepted in many fanancial organizations as per PCI Standard.
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Apr 12, 2012
I see many errors in the ACS 5.1(or 5.3) :5411 EAP session timed out..Becasue I checked the "remember my username and password everytime login" in the wireless network properties, and I can succeed to login finally. but in the ACS will see many errors like ”5411 EAP session timed out“
(Cisco Controller) >debug client 58:1f:aa:8f:ea:44
Fri Apr 13 16:09:36 2012: 58:1f:aa:8f:ea:44 Sending EAP-Request/Identity to mobile 58:1f:aa:8f:ea:44 (EAP Id 1)
Fri Apr 13 16:09:36 2012: 58:1f:aa:8f:ea:44 Received EAPOL EAPPKT from mobile 58:1f:aa:8f:ea:44
Fri Apr 13 16:09:36 2012: 58:1f:aa:8f:ea:44 Received Identity Response (count=1) from mobile 58:1f:aa:8f:ea:44
Fri Apr 13 16:09:36 2012: 58:1f:aa:8f:ea:44 EAP State update from Connecting to Authenticating for mobile 58:1f:aa:8f:ea:44
Fri Apr 13 16:09:36 2012: 58:1f:aa:8f:ea:44 dot1x - moving mobile 58:1f:aa:8f:ea:44 into Authenticating state
[code]....
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Jul 24, 2011
I was able to successfully implement MS-PEAP authentication with 5508 WLAN controllers and Cisco ACS v4.2. However, when I integrated 4402 WLC with version code 7.0.116, it did not pass across any authentication requests. Did a debug aaa events enable and there was no output. Configured another SSSID with PSK to test that my controller was OK and aaa debug was working, and there were CLI messages when I associated an AP.
why the 4402 is not working as I have compared configs with the 5508 and there is no difference. The shared secret is configured on both ACS and Controller and CA is downloaded on the ACS.
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Nov 12, 2012
I was pondering on getting a certificate fro ma public CA to maintain easier configuration for end users. There will be a multitude of devices on this wireless network configured with 802.1x PEAP. (iPhones, iPADs, Droids, and PC's of course).
If you were to get a certificate from a public CA, I'm assuming this would be just a regular server certificate from GoDaddy, or Verisgn?
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Jan 23, 2012
I have 802.1x/peap authentication in my wireless network with ACS 4.2 as the authentication server. I enabled PEAP machine authentication under the Unknown user policy --->database configuration sub-menu. I discovered that I was still able to access the wireless network on my android phone with my domain logon. I later discovered that there is an option in Group policy to force Windows XP clients to perform computer authentication. Now the problem is that windows 7 clients do not have the EAPOL option in the registry, hence the group policy object may not work. How to enforce machine authentication and stop unwanted devices without having to purchase a NAC server.
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Jun 29, 2011
ACS 5.1 EAP-PEAP Machine Authentication,
I have configured ACS 5.1 to check AD domain computer accounts then permit access, the next rule authenticates AD domain users and checks machine accounts with WAS MACHINE AUTHENTICATED "TRUE" permit.
My dilemma - Windows XP supplicant work fine and I can see the host/machine (Wireless device) authenticating followed by user credentials, but when I use the Intel Pro/set supplicant version 12.1 the same device fails authentication due to ACS not being able to verify a good previous machine authentication?
Is this problem ACS related or down to the Intel supplicant.
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Apr 2, 2013
A customer has RADIUS running on a Win Server 2008 R2 machine, has Autonomous 1140 APs and a mix of Windows 7 and XP Pro clients. Using PEAP as the authentication method the Win 7 clients can access the WLAN, but the Win XP clients cannot. The Win XP clients are at least SP2. I am doing some research before going to site on Friday and wanted to poll the community. I found an older post speaking to a MS Hotfix under KB#885453, but it referes to "third-party RADIUS servers," not MS servers URL.
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Jun 11, 2012
configure PEAP for wireless with Windows 2008. The doc we have only mentions Windows 2003. When we follw that document we get a faulure when we try to bind the certificate to we have generated to ACS 5.0 .
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