Using ISE as RADIUS to allocate IPs

Hi all,
is it possible to use the ISE as a RADIUS server to assign IP's to devices as they authenticate?
We have a private 3g cloud with a provider and all the endpoints are on dynamic IP's meaning that we cannot assign routeable subnets to each 3g device.
The plan is to be able to use a RADIUS server to allocate the device IP address dynamically. I have been told that this is possible using RADIUS and so I was wondering the the ISE could be used for this purpose.
If you think this post should be posted elsewhere, then please let me know and I shall move it.
thanks
Mario

Hi Neno, thanks for your input on this.
Firstly, we do not have control of the 3g infrastructure. The ISP requires us to be able to issue framed-ip-addresses using a RADIUS server, so this is the ISP's requirement.
Secondly, I have been looking at ways to implement this. From what I can see at the moment, I would have to create a user for each SIM and then write an authorisation profile which returns the framed-ip-address for each user.
Now what i cannot figure out is without writing an authorisation policy for EVERY user, how will the ISE know which Authorisation profile to return? or which IP address to return?
At the moment, I see that if we have say 10 SIM Cards, I would have to create, 10 users, 10 authZ profiles, 10 authZ policies... am i on the right track here?
Thanks
Mario

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Cut-Through Proxy / Authentication Proxy on Cisco ASA using ISE as AAA Server for allocating SGTs

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ISE to allocate a security group tag to the user session when he logs in, that tag would carried within out cisco network infrastrucutre to define the access
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Lovleen

Please refer to below step by step config guide for security group access policies
http://www.cisco.com/c/en/us/td/docs/security/ise/1-2/user_guide/ise_user_guide/ise_sga_pol.html

WPA2 Auth on WLC 5760 using ISE 1.2

Hello there,
I am trying to configure WPA2 802.1x authentication on my WLC that should use ISE as radius server which is set to authenticate AD users.
The issue is that when I try to connect the SSID, it does not forward the authentication request to ISE. Therefore, I dont see any authentication request on ISE coming from the client.
I am using the following cli config for the SSID.
wlan TESTSTAFF 70 TESTSTAFF
aaa-override
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security dot1x authentication-list WPA-Auth
session-timeout 1800
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aaa group server radius ISE_Group
server name ISE
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key <key>
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Thanks in advance.

is ur wlc and iSE is connected???
is ur Radius Shared secret is correct or same on both side?
Please check these: http://www.cisco.com/en/US/products/ps11640/products_configuration_example09186a0080bead09.shtml
Regards

WLC with ISE as radius and also external web server

Hi friends,
I am biulding a wireless network with 5508 WLC and trying to use ISE as radius server and also to redirect the web-login to it.
I was trying to understand that to achieve the external web-login, do i need to use the raduius-nac option under advanced on the guest wireless where i am trying this out. and if not, where do i actually use it?
So far what i have understood that i do need to have preauth ACL on the Layer 3 security, but the issue is there is no hit reaching the ISE.
any suggestions would be higly appreciated guys!
Regards,
Mohit

Hi mohit,
Please make sure the below steps for guest auth thru ISE,
1)Add the WLC in your ISE as netork devices.
2)In Guest SSID you need to choose the pre authentication acl.That acl should allow the below traffic
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    b.ISE to any
    c.any to dns server
    d.dns to any
3)The external redirect url will be
https://ip address:8443/guestportal/Login.action
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5)In advanced tab please choose the AAA override. No need of radius nac.
6)Create appropriate authorization profile in ISE for guest.Example is below ,

Client Exclusion Policies on WLC not working with ISE as RADIUS Server

Hi,
for our Guest WLAN (Security Setting for this SSID:Layer2: MAC filtering, Layer3:none) we use ISE as RADIUS Server. On WLC I enabled client exclusion polices and checked all options (Excessive 802.11 Auth. Failures etc..).. But even if a client fails 20times at authentication, it is not excluded on the wlc. It works with other SSIDs, where security settings are set to 802.1x.
Am I missing any settings here or do you have some tipps on how to troubleshoot this?
Thanks very much!

Hi Renata,
If those guest failures are not associated with valid guest users (i.e. people who have forgotten their account or entering the wrong password) there isn't anything that can be done. The main point of Guest WLAN is to make it as easy as possible for Guests - individuals with device configurations you don't want to deal with or know about, to connect your network for internet access. From a WiFi/802.11 perspective, the standard Guest WLAN setup means its easy for any device to connect.
If your Guest WLAN has the following:
SSID is broadcast enabled, Security = OPEN, Encryption = none, then any 802.11 device can find the WLAN via passive scanning and connect. And any device that connects will get the ISE portal. Once recieveing that portal they can guess away at valid username/password.
I would suspect that unless your Guest WiFi is adjacent to a Mall, school, hotel or other hi-density area of individuals with time and electronics on their hands, other than alerts in your ops window and logs, resources associated with this (WLC & ISE) are very low.
You can try and dull the noise a few ways.
Option 1. create and ISE log filter on those alerts so they don't cluter the console.
Option 2. Stop broadcasting the SSID. This is not a security measure, but will cut volume of people connecting to the SSID significantly. You will have to tell your guests what SSID or include it in their credential communication.
Option 3. Put a very simple PSK on the SSID. The PSK will become a public secret - shared with valid guests, doesn't have change as it's purpose is not security. You will have to include this information on their credential communication.
Option 4 - both 2 and 3
The most effective option would be 3.
Good Luck!

ISDN Authorization with RADIUS using ISE 1.1.2

Hi,
I am trying to move my ISDN dialup branches authentication/authorization from old ACS 4.1 to ISE appliance. Before it was through ACS 4.2 with TACACS protocol but now since we are moving to ISE we are moving them to ISE with radius.
Problem is that isdn client gets authenticated and authorized but calls get dropped and they dont able to communicate with HO. IP address is assigned by Head End router to all remote isdn dialing branches..
I have used default "PermitAccess" in authorization policy and authentication policy is also default. I dont understand where I am going wrong as authentication and authorization is sucessful.
aaa authentication ppp default group radius local
aaa authentication network default group radius
aaa accounting network default start-stop group radius
radius-server host 12.18.22.41
radius-server key *****
below is the router configuration for AAA
can any one help in this

CoA is not needed, nor supported for ISDN aaa, i used ACS 3.3 for this a long time ago. I think you should do some debugging if ise does not give you any errors.
try doing some debug aaa / debug radius & deb ppp nego if your calls are authenticated and ip is assigned to the calling router, you should see some disconnect reason in the debug.

Using ISE guest store via RADIUS

I have a question concerning the guest store on the ISE.
I would like to establish a guest portal on a WLC (currently running version 7.0.220.0). The guest network shouldn’t have any connection to the company network. So I can’t redirect to the ISE guest portal and have to use the local portal on the WLC and pass the login data to the ISE via RADIUS. Nevertheless I want to use the guest store on the ISE.
On the ISE I can only select the internal user store as identity source. But this seems not to include the guest user store.
Has anyone already implemented a similar solution or any idea how to access the guest store?
Thanks
Thomas

I just created a simple setup and tested the login.
It doesn't work with a user created as a guest account.
If I create the user in the normal internal identity store I works fine.
Might there be a difference between ISE Versions?
We are currently using Version 1.1.0.665 on a VM for testing purpose.
This is what the details show:
11001 Received RADIUS Access-Request
11017 RADIUS created a new session
Evaluating Service Selection Policy
15048 Queried PIP
15048 Queried PIP
15004 Matched rule
Evaluating Identity Policy
15006 Matched Default Rule
15013 Selected Identity Store - Internal Users
24210 Looking up User in Internal Users IDStore - tuser001
24206 User disabled
22057 The advanced option that is configured for a failed authentication request is used
22061 The 'Reject' advanced option is configured in case of a failed authentication request
11003 Returned RADIUS Access-Reject
11001 Received RADIUS Access-Request
11017 RADIUS created a new session
Evaluating Service Selection Policy
15048 Queried PIP
15048 Queried PIP
15004 Matched rule
Evaluating Identity Policy
15006 Matched Default Rule
15013 Selected Identity Store - Internal Users
24210 Looking up User in Internal Users IDStore - tuser001
24212 Found User in Internal Users IDStore
22037 Authentication Passed
Evaluating Authorization Policy
15004 Matched rule
15016 Selected Authorization Profile - Guest
11022 Added the dACL specified in the Authorization Profile
11002 Returned RADIUS Access-Accept

Radius server web authentication using ISE

Hi,
Can anyone point me in the direction of a guide to implement radius server web authentication using ISE?
I need this to be layer 3 Web Auth with all authentication requests coming from the wireless anchor controller, therefore don't think I can implement central web auth on ISE as detailed in the user guide as its layer 2 and auth requests come from the foreign controller.
The following link explains "Radius Server Web Authentication" using ACS. I need to find something similar for ISE - http://www.cisco.com/c/en/us/support/docs/wireless-mobility/wlan-security/69340-web-auth-config.html
Thanks,

Hi,
Please check these:
Central Web Authentication on the WLC and ISE Configuration Example
http://www.cisco.com/c/en/us/support/docs/security/identity-services-engine/115732-central-web-auth-00.html
Regards
Dont forget to rate helpful posts

Using ISE for guest access together with anchor controller WLC in DMZ

Hi there,
I setup a guest WLAN in our LAB environment. I have one internal WLC connection to an anchor controller in our DMZ. I'm using the WLC integrated web-auth portal which works fine.
To gain more flexibility regarding guest account provisioning and reporting my idea is to use Cisco Identity Services Engine (ISE) for web-authentication. So the anchor controller in the DMZ would redirect the guest clients to the ISE portal.
As the ISE is located on the internal network while the guest clients end up in the DMZ network this would mean that I have to open the web-auth portal port of ISE for all guest client IPs in order to be able to authenticate.
Does anyone know of a better solution for this ? Where to place the ISE for this scenario, etc ?
Thx
Frank

So i ran into a similar scenario on a recent deployment:
We had the following:
WLC-A on private network (Inside)
ISE Servers ISE01 and ISE02 (Inside)
WLC-B Anchor in DMZ for Guest traffic (DMZ)
ISE Server 3 (DMZ)
ISE01 and ISE02 are used for 802.1X for the private network WLAN.
Customer does not allow guest traffic to move from a less secure network to a more secure network (Compliance reasons).
The foreign controller (WLC-A) must handle all L2 authentication and it must use the same policy node that the clients will hit for web auth. Since we want to do CWA, we use Mac Filtering with ISE as the radius server. If you send this traffic RADIUS authentication for Mac Filtering to ISE01/ISE02, it will use https://ise01.mydomain.com/... to redirect the client to. Since we don't allow traffic to traverse from the DMZ with the anchor in it back inside to the network where ISE01 and ISE02 are, client redirection fails. (This was a limitation of ISE 1.1. Not sure if this persists in 1.2 or not.
So what now? In our deployment we decided to use a 3rd ISE policy node (ISE03 in the DMZ) for guest authentiction from the Foreign controller so that the client will use a DNS of https://ise03.mydomain.com/... to redirect the client to. Once the session is authenticated, ISE03 will send a CoA back to the foreign which will remove the redirect for the session. Note, you do have to allow ISE03 to send a CoA.
In summary, if you can't allow guest traffic to head back inside the network to hit the CWA portal, you must add a policy node in a DMZ to use for the CWA portal so they have a resolvable and reachable policy node.

Guest Anchor with web auth using ISE guest portal

Hello All,
Before launching into my exact issues, could anyone confirm if they have completed a wireless Guest anchor setup using 2504 controllers on 7.4 as the anchor (5508 is the foreign) with webauth external redirection at ISE 1.1.3 using ISE Guest Services?
I am attempting this for an internal POC and have hit a couple of issues. Firstly I am looking for correct configuration confirmation prior to going in depth with a couple of the issues. I've been using the TrustSec 2.1 how to guides to build the parts I am not strong on so if anyone has actual completed this setup, I'd love to go through it with you.
massive thanks to anyone that can assist.
JS.

Thanks for the reply RikJonAtk.
so to start with, based on the trust sec documents, of the guest WLAN on the anchor I need to configure mac filtering at the layer 2 security menu as well as enable RADIUS NAC under the Advanced tab. But when I do this, I get an error message that states that mac filitering and RADIUS NAC cannot be enable at the same time.
Additionally, if I just enable the RADIUS NAC setting under the Advanced tab in the WLAN, I get another error message that states that the priority order for Web-Auth can only be set for radius, so I go to the AAA server tab and send local and LDAP to the not use column and hit apply. If I move to another menu then check the priority order again under the AAA servers tab, the local and LDAP have been moved back to the menu field to be used again. So I initially though it might be a bug, but I was hoping to find someone here that has done this already and can look at my issues and maybe walk me through their configs, which I'll mirror and see how it goes.
Thanks in Advanced,
JS

Can I use ISE IPN without posture for VPN with Base license only?

I'm looking at ISE licensing, and both Base and Advanced licenses have VPN listed. I could not find any document that provides guideline for VPN implementation using ISE Base license only.
1. Can I use ISE IPN (Inline Posture Node) functionality without posture assessment with ISE Base license only? (I know it has to be ISE hardware appliance, and I know that Posture assessment requires ISE Advanced license.)
2. Do I have to use IPN for VPN deployment using ISE as the Radius server?
3. If I do not have to use IPN for VPN, can I use ISE for Authentication and Authorization in the same way as I use ACS?
Thanks,
Val Rodionov

Val,
There is no need to consider IPN if you are not using posturing. You can use ISE much like ACS for radius authentication for vpn users.
If posturing is down the road and your hope is to have an architecture in place and license later, then I am sure that you can use the ipn with base licensing, however I would strongle recommend working with the PDI (for partners) for help and confirmation.
Thanks,
Tarik Admani
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ISE External radius server

Hello,
Since the JRS roam servers have to be put in a Radius Server sequence on ISE, which node IP address is meant to be registered with JANET, PAN or each PSN IP address. I would have thought it to be the PAN since all the external radius servers are configured on the PAN, but thought I should ask just to be sure. Thanks

Yes, even though the configuration is done on the PAN, only the ise nodes that have the policy service role enabled, will be used to forward requests using the external radius proxy feature.

Cisco ISE: External RADIUS Server

Hi,
I would like to forward RADIUS from PSN to another PSN. I already defined "External RADIUS Servers".
So, how can I use this external RADIUS server to process my request ?
Looking at the user guide but didn't find any information about this setting (For rule based not simple rule)
If anyone use this, please suggest this to me.
Thanks,
Pongsatorn

Defining an External RADIUS Server
The Cisco Cisco ISE can function both as a RADIUS server and as a RADIUS proxy server. When it acts as a proxy server, the Cisco Cisco ISE receives authentication and accounting requests from the network access server (NAS) and forwards them to the external RADIUS server. The Cisco Cisco ISE accepts the results of the requests and returns them to the NAS. You must configure the external RADIUS servers in the Cisco Cisco ISE to enable it to forward requests to the external RADIUS servers. You can define the timeout period and the number of connection attempts.
The Cisco Cisco ISE can simultaneously act as a proxy server to multiple external RADIUS servers. You can use the external RADIUS servers that you configure here in RADIUS server sequences. This External RADIUS Server page lists all the external RADIUS servers that you have defined in Cisco Cisco ISE. You can use the filter option to search for specific RADIUS servers based on the name or description or both.
To create an external RADIUS server, complete the following steps:
Step 1 Choose Administration > Network Resources > External RADIUS Servers.
The RADIUS Servers page appears with a list of external RADIUS servers that are defined in Cisco ISE.
Step 2 Click Add to add an external RADIUS server.
Step 3 Enter the values as described:
•Name—(Required) Enter the name of the external RADIUS server.
•Description—Enter a description of the external RADIUS server.
•Host IP—(Required) Enter the IP address of the external RADIUS server.
•Shared Secret—(Required) Enter the shared secret between Cisco Cisco ISE and the external RADIUS server that is used for authenticating the external RADIUS server. A shared secret is an expected string of text that a user must provide to enable the network device to authenticate a username and password. The connection is rejected until the user supplies the shared secret. The shared secret can be up to 128 characters in length.
•Enable KeyWrap—This option increases RADIUS protocol security via an AES KeyWrap algorithm, to help enable FIPS 140-2 compliance in Cisco ISE.
•Key Encryption Key—This key is used for session encryption (secrecy).
•Message Authenticator Code Key—This key is used for keyed HMAC calculation over RADIUS messages.
•Key Input Format—Specify the format you want to use to enter the Cisco ISE FIPS encryption key, so that it matches the configuration that is available on the WLAN controller. (The value you specify must be the correct [full] length for the key as defined below—shorter values are not permitted.)
–ASCII—The Key Encryption Key must be 16 characters (bytes) long, and the Message Authenticator Code Key must be 20 characters (bytes) long.
–Hexadecimal—The Key Encryption Key must be 32 bytes long, and the Message Authenticator Code Key must be 40 bytes long.
•Authentication Port—(Required) Enter the RADIUS authentication port number. The valid range is from 1 to 65535. The default is 1812.
•Accounting Port—(Required) Enter the RADIUS accounting port number. The valid range is from 1 to 65535. The default is 1813.
•Server Timeout—(Required) Enter the number of seconds that the Cisco Cisco ISE waits for a response from the external RADIUS server. The default is 5 seconds. Valid values are from 5 to 120.
•Connection Attempts—(Required) Enter the number of times that the Cisco Cisco ISE attempts to connect to the external RADIUS server. The default is 3 attempts. Valid values are from 1 to 9.
Step 4 Click Submit to save the external RADIUS server configuration.

Using ISE to assign ACL's for VPN users

Hi,
I've just implemented ISE into our environment using various documents and videos found online but have not been able to find anything about using ISE to Authenticate remote users via VPN and assigning them the ACL's created for thewir level of network access.
Does anyone know of a good document or training video knocking about that I can use?
Thanks
Jason

Jason,
If the ACL is present on the ASA you can use the "filter-id" radius attribute to reference the acl to the user's session. You can make this work by configuring an authorization profile and tying this in with your authorization policy for vpn users.
If you want to push an acl then my recommendation is to use the cisco-av-pairs to push the acls since the username is associated with the acl that is applied to the username of the vpn session.
http://www.cisco.com/en/US/docs/security/asa/asa84/configuration/guide/ref_extserver.html#wp1763743
Thanks,
Tarik Admani
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ISE: test-radius user check fails

The ISE user guides suggest to use a username called 'test-radius' as option to the 'radius-server host' commands. This will cause the respective NAD (a Cat3560 in my case) to make an authentication check on each configured ISE every 60 minutes.
The problem is that every hour I see an authentication failure for this user, but ONLY on my second ISE (I'm running a Standalone HA deployment). Since both hosts should replicate the same user DB, why would it only fail on the second ISE? When I direct end-user login authentications to the second ISE exclusively, they will be passed normally.
See the attached screenshot of the failed authentication attempt for the test-radius user. I've been seeing this with ISE 1.1 as well as 1.1.1.
The relevant config on the switch is:
username test-radius secret 5 <snipped>
radius-server host 172.26.10.35 auth-port 1812 acct-port 1813 test username test-radius key 7 <snipped>
radius-server host 172.26.10.36 auth-port 1812 acct-port 1813 test username test-radius key 7 <snipped>
Questions:
- How can I get rid of that error?
- Is that test-radius option of much use at all in an ISE setup? As far as I could find out, it would be a measure to figure out if the second ISE policy server is running at all as long as the first one hasn't failed.
Thanks for any help.
Toni

Hi Toni,
I believe you do not see any Access-Requests with the 'test-radius' on your primary ISE PDP server at all. The reason is simply that this server is already known as alive due to the regular Access-Requests for user authentication, so there is really no reason for checking its availability.
Obviously this does not explain the behavior why the test request is failing. Anyhow,sniffing the RADIUS request packets from your switch towards the ISE should bring light into the darkness.
If you are having a switch with software version 12.2X (Test switch: WS-C3560G-48PS, C3560-IPBASEK9-M, 12.2(53)SE2) the encrypted password contained does not match the one that you have locally configured on the switch (You may want to use Wireshark as proof).
On the other hand, if you are having a switch with software version 15.0X (Test switch: WS-C3560X-48P, C3560E-UNIVERSALK9-M, 15.0(1)SE3) the encrypted password contained does match the one that you have locally configured. Side node: It will not work with an MD5 encrypted password, so you have to use 'username test-radius password '.
However, this whole behavior does not affect user authentication at all and is hence only cosmetic. For the switches itself it only matters if it gets a response from the ISE (RADIUS) to know if it is alive or not.
Hi Tarik,
Testing with the 'test aaa...' command does not result in the 'Authentication Failure', that Toni had mentioned.
Kind regards and hth,
Stephan
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Using ISE as RADIUS to allocate IPs

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