Cisco AAA/Identity/Nac :: ACS 5.1 / How To Ignore All Host Authentication Requests
Mar 17, 2011
I am using ACS5.1 connected to WLC (v7.x) and frequently see host auth requests in the ACS logs. I am not interested in seeing host auth requests at all. Is there anyway just to ignore these.The issue is that these will always fail. If I enable the lock out facility within WLC and a host continually tries to auth the WLC will lock-out that mac address meaning that when the user is ready to connect with their own credentials they are unable to as the WLC is blocking that mac address from connecting to the wireless network.I tried disabling the 'process host lookup' option, but this apparently only changes the type of request to appear like a standard PAP auth request which again fails, filling up my RADIUS logs and stopping me from enabling the WLC lookout feature.So, as I say, I want to simply ignore host requests. I have no control over the end points so am unable to go and update config etc of these devices.
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Sep 20, 2012
We`re using a WLC 5508 with SW 7.2.103.0.The most things are working fine, but i have a problem with the web auth.
Setup:
- Max Concurrent Logins for a user name is set to 1
- Max-Login Ignore Identity Response is set to enable
- Web Authentication Type is set to customized
The Problem:
- the user "test" is logged in at device1 (working), the same user "test" try to login at device 2 (is not working, fine!) -> login is not accepted, WLC redirects to the INTERNAL Web Login Page.The problem is the redirect to the internal web login page after failed login. If i try to login with a not existing user, the redirect is working perfect to the customized web login.
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Mar 18, 2013
I'm working on a project where a wi-fi client is tracked and located using RADIUS authentication requests. The problem I'm running into is that the WLC (5508) sends an RADIUS authentication request to my freeradiusd, which is ok so far, but if the client roams to another accesspoint (3602AG, 1131AG, 1252AG), the WLC does not send a further RADIUS auth. request - and the client is allowed to connect to the next ap.Is there an option like RADIUS-cache which I can disable, so that the WLC sends everytime an authentication request when a client tries to connect to an ap or roams from one ap to another one?
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Dec 11, 2011
I have configured ACS 5.1 and using Tacacs. I have two juniper SSG140 FW's in different subnet. Tacacs authentication is working on one SSG140 FW, but not on the other one. Tacacs configuration on both FW's are exactly the same. Both FW's have been added in the ACS server with the same shared secret key same profile etc. I don't even see the authentication requests from the FW. ACS can ping both FW's and vice versa. [code]
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Jan 24, 2012
I'm currently looking for a solution in order to restrict the modification of the host internal identity store (add or delete MAC host) per group. The default administrator roles does not include "per group restriction". Under the ACS I defined one group per department? My objective it to allow each department to access their ACS MAC database to add or delete MAC addresses as required.
How to restrict internal identity store per group?Do I need to create new roles? and how?I was not able to get an answer from the ACS ADMIN manual.
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Jan 16, 2012
I configured before ACS v4.2 to authenticate network devices using internal users at first, and if the user is not found use AD list users. But with v5.3 I have some problems doing this, on identity policies I use rule based result selection option, I configured 2 polices for Identity source, one for Internal Users and other policy for AD user, but it only works with the first policy, internal users or AD, but works only for the first policy identity. how to do that, if the user is not found on first policy, continue to the next policy.
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Jul 3, 2011
I need a specify users to allow access to particular devices and give privilege only for show command or show run. Here is how I tried to configured.
1. Configured two seperate Shell Profile and Command set with privilege level 4-5 and allowing only show run command
2. create seperate service selection rule with adding the require NDG and protocol TACACS and maching service "RestrictAccess"
3. In the RestrictAccess Service I have following configured; Identity: internal users, Group Mapping to a particular group where the user exists, authorization: matching the above created identity group, NDG, shell profile, command sets
All the steps are attached in the .doc file. However when I tried with the particular user he is able to access everything and he is not hitting the correct access rule.
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Jul 31, 2012
I have 2 SSIDs on WLCs.I would like to have 1 SSID point to the acs radius using LDAP store and the 2nd SSID point to the acs radius using the host identity store for mac filtering.both scenarios are working, but not together.if I adjust the rule order I can get one SSID, but then the other fails. [code] It seems to me that there should be a simple process to make this happens. I thought if the rule is not matched it would move on to the next rule etc.I might be able to live with first checking ldap and if that fails move on to the local host db, but that seems ineficient. url...
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Feb 4, 2013
I was wondering if I can force catalyst 2960 to skip startup config stored in NVRAM and boot with no config everytime it is powered. I tried to find it on google and in cisco white papers but still no luck. I found only commands that begin with "set boot config-register ... ", but switch acts like it does not know these commands.
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Oct 19, 2011
we are facing a strange problem with a Cisco Small Business SG 200-08 Switch (firmware release 1.0.1.0). When configuring the switch to act as a RADIUS Client with 802.1x port security enabled, it sends the “Account Name” attribute to the radius server with max. 32 characters. The string comes in this format: host/dns Host Name and will be cut after 32 characters which will cause the NPS to say: “The specified domain does not exist.” and NPS is right. When I reduce the hostname so that host/dnsHostName <= 32 characters, authentication is working fine. And by the way, we also have a SG 200-26 in production and it can handle more than 32 characters which lead me to think of a bug in the firmware of the SG 200-08.
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Feb 27, 2013
Web auth redirect URL gets dropped if stateful firewall is between webauth host and switch management interface. Aaron at Cisco live london kinda hinted about maybe Cisco working on this ? We can't disable stateful inspection. Is there any other solutions or workarounds ?
"Although this approach introduces additional hops in the return path from the switch to the host, it produces negligible load on the default router and intervening infrastructure since only the WebAuth traffic from the switch to the host follows this path. In campus designs that do not use SVIs on the data VLAN,6 a default route is typically already configured. In this case, no additional configuration is required to support WebAuth.
However, problems may arise in the case in which traffic to the default router is bridged through a stateful firewall. The original SYN packet in the TCP handshake is consumed by the access switch, so the first packet that the firewall sees is the SYN-ACK packet from the access switch. Stateful firewalls typically drop SYN-ACK packets if they have not seen the original SYN packet.In this case, you will need to turn off stateful inspection for ports 80 and 443 on the firewall."
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Feb 2, 2012
In order to restrict access to websites on our internal network, would we be able to put an ASA in front of the web server and force users to authenticate through the ASA and, once authenticated, allow only port 80 or 443 traffic for that use? The ASA would query the ACS 5.1 server for authentication/authorization using AD as the identity store. Is this even possible with TACACS?
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Apr 1, 2012
My customer has a large installed base of MACs, all connected via controller-based (5508) WLAN. He wants to grant access to the network based on the device's mac addresses and move the WLAN-clients to a specific VLAN.I added all devices with their mac addresses to the ACS internal identity store for hosts.According to the following message the client sends the user-login credentials (chegger) within the RADIUS-request instead of the clients mac address and of course it has to fail. After many configuration changes, I ended up always with the same result.
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Jun 13, 2012
I have question on EAP-TLS with ACS 5.2. If I would like to implement the EAP-TLS with Microsoft CA, how will the machine and user authentication take place? Understand that the cert are required on both client and server end, but is this certificate ties to the machine or ties to individual user?
If ties to user, and I have a shared PC which login by few users, is that mean every user account will have their own certificates?
And every individual user will have to manually get the cert from CA? is there any other method as my environment has more than 3000 PCs.
And also if it ties to user, all user can get their cert from CA with their AD login name and password, if they bring in their own device and try to get the cert from CA, they will be able to successfully install the cert into their device right?
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Jan 22, 2012
I have a new ACS 5.3 installation which I have joined to our AD Domain and added the directory groups into. I have also added all our devices into ACS and their groups etc but I am still only able to authenticate on the our switches with an internal ACS account, when I try with an external AD account the log shows the following error "Subject not found in the applicable identity Store (s)"
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Apr 18, 2010
We got recently a Cisco Secure ACS 1120 and i upgraded the Appliance to 5.1 from 5.0 with all your support
Now I need to integrate Cisco ACS 5.1 with RSA Authentication Manager 6.1 . I Successfully Downloaded config file from RSA ACE Server and exported into ACS 1120.
I also Added ACS as a NetOS Agent in the RSA Server , during the process i found few warnings . The ACE Server is not able to Resolve the IP Address to NAme ( DOes it Necessary ?? ).
I havent created any secret Key file for communication between ACS and RSA and encryption i used is DES.
Now when I log into ACS and search for Devices in the Identity Store Sequences i am not able to Look for RSA Token Sever .
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Nov 22, 2011
I have been trying to get our IPS (ASA-SSM-10 and 4260) to authenticate with Cisco Radius ACS 5.2 and they are not working. However, I was able to get them working with Microsoft Radius. Below is the logs from the IPS:
evStatus: eventId=1321566464942057375 vendor=Cisco originator: hostId: NACAIRVIDLAB1 appName: authentication appInstanceId: 350 time: 2011/11/23 17:50:38 2011/11/23 09:50:38 GMT-08:00 controlTransaction:
[Code].....
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Dec 13, 2012
If laptop/desktop goes on sleep mode or keep connected with interface configured for 802.1X for more than 12 hours it does not work or not connect to Exchange server, Cisco ISE console, office communicator..for re authentication i need to restart PC/ Laptop or unplug and replug lan cable from it!but before restarting i am able to ping all DNS, DHCP, OCS, everything..[code]
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Mar 9, 2011
I would like to konw does Cisco ACS 4.x / 5.x natively support Two factor authenication, but not act as a Radius Proxy?
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Feb 23, 2012
I need to limit to some AD groups, authentication with ACS 5.3.For example, i need that only users os somedomain.com/users/test1 are authenticatet via ACS --> ADS.
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Mar 4, 2012
I have a Cisco ASA (8.2) setup with remote access for my users using Cisco VPN client. The authentication is passed off to my ACS 5.3 which then checks with AD. What I've done so far is create Access Policy rule where I define specifically the Location and NDG where the ASA is and then a DenyAllCommands command set. This should pass authentications just fine but this also gives those users the ability to remote connect directly into the ASA and login successfully. Even though there is a Deny Commands there I still would prefer they get Access Denied as a message. If I do a Deny Access on the ShellProfile then this stops the login authentication altogether.
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Jun 14, 2011
We would like to enable ACS authentication to login to different routers (Cisco 881s) we got that are interconnecting with our WAN via VPN tunnels. We would like to avoid using public IP for the router to communicate and relay user/password info with the ACS server and rely on the server's private IP instead. The problem is that all the router's outside interfaces connect to the Internet using public IPs and when the router wants to communicate with the ACS server it will use its public-facing interface IP and that'll fail. We can ping the server obviously when we set the source to the internal LAN IP.
The question is is there a way to have the router communicate with ACS across the VPN tunnel using its private IP?
config being used and tested succesfully on local devices:
aaa new-model
tacacs-server host 10.x.x.x single-connection key xxxxxx
aaa authentication login tacacs-local group tacacs local
[Code].....
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Aug 17, 2011
I have a dot1x client with client certificate working well with my ACS 5.2 and EAP-TLS. Now I would like to configure the Re-Auth periode on the ACS 5.2, I did the following:
1. Configure a Access Profile with Reauthentication Timer = static and 30 seconds (see attachment ACS1.png and ACS2.png)
2. Enabled authentication periodic and authentication timer reauthenticate server on switchport
interface GigabitEthernet1/0/x
description to dot1x clients
switchport access vlan 5
switchport mode access
authentication event fail action authorize vlan 998
[code]....
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Aug 8, 2012
i am evaluating ACS 5.3 with an ASA5505, by using password management in the IPSec tunnel config i am able to authenticate the VPN clients using mschapv2, however, the SSH sessions are authenticated using PAP
I have looked for days and days for an answer without success, is this by design?
Cisco documents state that SSH can be authenticated via TACACS with PAP,CHAP or MSCHAPv1, however, It seems to be default to PAP
From Cisco Doc: TACACS+ Server Support # The security appliance supports TACACS+ authentication with ASCII, PAP, CHAP, and MS-CHAPv1
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May 13, 2011
I am getting ready to install a new ACS 5.1 server to replace my current 4.1 acs box. I wanted to start off with a fresh install rather than upgrading all of my 4.1 data.
Can I have devices (ASA for VPN authentication, routers & switches for user authentication) use both for authentication while I get all the users configured in the new box?
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Mar 10, 2011
I have a questión about radius authenticaction with AD, when I log in into the network with user in AD and I make a mistake in password my radius authenticaction event in ACS 5.2 dont show me this logg. only show the authentication succeeded but dont show me the authentication failed. Maybe i must to enable same service to show the authentiaction failed. The Voice authetication works fine..
This is the confg in the port of the switch:
interface FastEthernet0/12 switchport mode access switchport access vlan 2 switchport voice vlan 10 authentication port-control auto authentication host-mode multi-domain authentication violation protect authentication event fail action authorize vlan 11 authentication event fail retry 2 action authorize vlan 11 authentication event no-response action authorize vlan 11 authentication periodic authentication timer reauthenticate 60 mab dot1x pae authenticator dot1x timeout tx-period 10 dot1x max-reauth-req 3 spanning-tree portfast end
Vlan 2: DATA
Vlan 10: VOICE
Vlan 11: GUEST
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Sep 7, 2012
I configured ACS 5.3 and added AAA clients with TACACS+ server and shared secret key as cisco123. i did the below config on switch also. when i try to authenticate login with ACS it does not respond. Find the configuration and debug output.nd
In debug output it gives ruser and rem_addr is null. i did not understand why .
I am able to ping to ACS server and i used telnet 192.x.x.10 49 and it gives the proper output.
aaa new-model
aaa authentication login default group tacacs+ local
!
tacacs-server host 192.168.60.10 key cisco123
tacacs-server directed-request
ip tacacs source-interface Vlan172
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May 22, 2012
I notice 8.4(4) now has public key authentication (just like IOS - yay!) and found a couple of issues: The CLI config guide [URL] states incorrect syntax for adding the public key to the ASAThere is an undocumented ASA limit on the public key size supported
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Sep 7, 2011
I have several devices on the same subnet and with similar configuration. All of them were entered manually on the ACS server and are configured to authenticate using TACACS+. Some of the devices can authenticate ok, but other will timeout. I did a tcpdump on the firewall port and can see the device sending the SYN to the ACS server but the server sends no reply to the device.
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Apr 17, 2011
I am using Cisco ACS 5.1. I would like to authenticate my ip phones with mab (Avaya phones) and the commputers with dot1x.Everything works fine except that the phones which are successfully authenticated with mab tries to authenticate again and again and again ... and this fills up the ACS logs. Every authentication is successfull and the phone does not hang up. But this fills up my logs and makes them unusefull.
switch version: cat4500-ipbasek9-mz.122-53.SG3.bin
port config:
interface FastEthernet2/25 switchport access vlan 107 switchport mode access switchport voice vlan 502 switchport port-security maximum 3 switchport port-security switchport port-security aging time 1 switchport port-security aging type inactivity no logging event link-status load-interval 60 speed 100 duplex full qos vlan-based authentication event fail action authorize vlan 109 authentication event server dead action authorize vlan 101 authentication event server alive action reinitialize authentication host-mode multi-domain authentication open authentication order dot1x mab authentication priority dot1x mab authentication port-control auto authentication violation restrict mab no snmp trap link-status dot1x pae authenticator dot1x timeout quiet-period 30 dot1x timeout server-timeout 25 dot1x timeout tx-period 15 dot1x timeout supp-timeout 25 dot1x max-req 3 tx-queue 3 priority high no cdp enable spanning-tree portfast ip dhcp snooping limit rate 10end
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Feb 25, 2013
I am in the process of migrating from ACS 4.1.1.23 to ACS 5.4.I have migrated our users and Network Device Groups and configured external Identity stores like AD and RSA.I want to authenticate our Wireless users with AD and VPN users through RSA.I am unable to create policies to get this UP and working.
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Jan 4, 2012
Currently I am running Cisco ACS 3.2 ,now wanted to upgrade with the latest version along with the Authentication using AD , process/Document to upgrade the same .
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May 17, 2011
I have configured the cisco 2960 switch with AAA & the radius server is free radius. I am able to login into the switch when radius server is working.But when radius server is not reachable, in that particular condition the switch doesn't move to local authentication configured on the switch.
aaa new-modelaaa group server radius radiuss server 10.1.0.215 auth-port 1812 acct-port 1813!aaa authentication login default group radiuss enableaaa authentication login CONSOLE localaaa authentication enable default group radiusaaa authorization exec default group radius if-authenticated
radius-server host 10.1.0.215 auth-port 1812 acct-port 1813 key 7 071F285C422948514117171
radius-server retransmit 2
line con 0 exec-timeout 5 0 privilege level 15 password 7 14341B1B7D6F0417626173455E47060F login authentication CONSOLEline vty 0 4 access-class 91 in exec-timeout 5 0 password 7 106D004F2C3B7B7F757E6A64812812d transport input sshline vty 5 15 access-class 91 in exec-timeout 5 0 password 7 106D000A061845jsajtqwkd327E6A64 transport input ssh
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