Network Time Protocol Status Error Acs
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Secure Access Control SystemConfigureConfiguration Examples and TechNotes ACS 5.x: Cisco ACS Synchronization with NTP Server Configuration Example Download Print Available Languages Download Options PDF (10.4 KB) View with Adobe cisco acs timezone Reader on a variety of devices Updated:Jun 15, 2012 Contents Introduction Prerequisites Requirements
Cisco Acs Ntp Setup
Components Used Conventions Configure NTP Configuration on Cisco ACS Verify Troubleshoot Problem: Clock drifts too much and NTP fails when cisco acs timezone codes ACS is installed on a VMWare machine Solution NTP Synchronization lost after the interface IP address of ACS is changed Solution Related Information Introduction Network Time Protocol (NTP) is a protocol used
Acs Ntp Configuration
in order to synchronize the clocks of different network entities. It uses UDP/123. The main objective to use this protocol is to avoid the effects of variable latency over the data networks. This document provides a sample configuration for the Cisco ACS to synchronize its clock with NTP server. ACS 5.x is allowed to configure up to two NTP servers. Prerequisites Requirements There are no specific cisco acs timezone configuration requirements for this document. Components Used The information in this document is based on these software and hardware versions: Cisco Secure ACS Version 5.x The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command. Conventions Refer to the Cisco Technical Tips Conventions for more information on document conventions. Configure In this section, you are presented with the information to configure the features described in this document. Note:Use the Command Lookup Tool (registered customers only) to obtain more information on the commands used in this section. NTP Configuration on Cisco ACS In order to synchronize the time of Cisco ACS with an NTP server, complete these steps: Manually configure the date and time with the clock set
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Experts Exchange > Questions > Cisco ACS server clock skew error Want to Advertise Here? Solved Cisco ACS server clock skew error Posted cisco acs restart services on 2011-10-05 Network Operations 1 Verified Solution 4 Comments 3,430 Views Last Modified: 2012-05-12 Hello all, i have a Cisco ACS server configured in a virtual environment - V-Sphere. The ACS is used for authenticating wireless and VPN http://www.cisco.com/c/en/us/support/docs/security/secure-access-control-system/113579-acs-ntp-vmware-00.html users RADIUS. Also it is used for for authenticating netork admins logging in to routers and switches etc... TACACS is used for this. The ACS talks to Active directory to authenticate the users. Every so often, maybe every 3 months, people are not able to authenticate. I log on to the ACS GUI page, and perform a connectivity test to AD. It fails and says there is a clock skew error. i then have to manually SSH https://www.experts-exchange.com/questions/27381023/Cisco-ACS-server-clock-skew-error.html to the ACS, change the clock and then restart. the funny thing here is, the clock on ACS has to be 1hour and 10 minutes behind the domain controller for the link between ACS and AD to be successfull. If i set the correct time on the ACS then the connection actually fails - clock skew error. does anybody know a fix for this? maybe someone has seen this before? its even more frustrating because, even though all my NAS devices such as wireless access points, VPN concentrator etc... are configured to use an alternative server for user authentication, this other server is never attempted becase the wireless access point for instance can still see the ACS. Therefore the secondary authentication server is never attempted, and the user just fails authentication based on the clock skew error. a quick fix is to power off the ACS, and then the secondary auth server is used. But this is obviously just a workaround and would prefer a better solution. thanks in advance. 0 Question by:L-Plate Facebook Twitter LinkedIn Google LVL 14 Best Solution byanoopkmr you may need to configure NTP.. this what i found in the cisco forum Please go throug the below paragraph ( details can be found at https://supportforums.cisco.com/thread/2017996) The error Go to Solution 4 Comments LVL 14 Overall: Level 14 Network Operations 3 Message Expert Comment by:
I described a little bit the installation process for Microsoft Active Directory. Now it's time to go ahead and talk about the ACS 5.x integration with AD. In the meantime I changed the version "5.1" to "5.x" as version 5.2 http://www.firstdigest.com/2011/05/acs-5-1-with-active-directory-integration-part-ii/ is already out there. This tutorials work for both versions. Maybe you are wondering https://en.wikipedia.org/wiki/TR-069 why I don't have a separate chapter about the installation process of ACS 5.x. The reason is that the installation is pretty straightforward, as you can see below. You have to follow some instructions, add some mandatory information (IP address, username, password…) and you're done. Very simple. Because an image worth a thousand words, I took some screenshots during cisco acs the process to make explanation more easy to follow. Load the ACS 5.x image and after the initial screen you have to see the following warning. YES is the correct answer. ACS 5.x will start the installation If everything goes well, you should see a screen asking to type the keyword "setup" Next, ACS 5.x will ask for some mandatory information: Next, ACS 5.x will install all core files and when done it will cisco acs timezone show a prompt to login. You can go ahead and login or open a web browser and type https://your-ip/acsadmin (in my case this would be https://172.31.82.8/acsadmin , according to the image above). You should see something like this: Default username: acsadmin and password: default. The system will require to change the default password: Last step, before system is operational, require you to add the license file. If you got the ACS 5.x image from Cisco website they will provide you with a trial license file or a standard / extended license , if your company already acquired one. If the installation part is very simple, the next lines I'm sure are critical for some of you. ACS 5.x is available for 2 platforms: bare metal system (that means a dedicated machine) or VMware appliance. If you are like me, then you don't have a dedicate machine for testing some ACS 5.x solutions and VMware can be difficult sometimes to install and operate. The next alternative, which is free by the way, is VirtualBox. Thanks to Nick Bettison, (Twitter @linickx) we have now a solution to install ACS 5.x on VirtualBox. He describes step-by-step in an easy to understand example how you can install ACS 5.1 on VirtualBox. As confirmed in a later post, this solution works also for ACS