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GPC is in the process of implementing Network Access Control to better secure GPC's network and computing resources.

We will being implementation mid- September 2008.

The GPC Service Desk can be reached via email: servicedesk@gpc.edu or by phone:  678-891-3460.

Office of Information Technologies

Frequently Asked Questions for Employees

1.What is Network Access Control (NAC)?
2.Do I need to login to the NAC when using a GPC computer?
3.Do I need to login to the NAC when using my own personal computer or mobile device?
4.When I use my own personal computer or mobile device I am not automatically directed to the NAC login page when opening my web browser. How do I login?
5.What is the Cisco Clean Access Agent?
6.?Who needs the Cisco Clean Access Agent?
7.How do I know if I have the Cisco Clean Access Agent?
8.Are there time limits on accessing the GPC network after sucessfully authenticating with the NAC?
9.How many computers/ devices can I have logged into the NAC at one time?
10.I am trying to log into a computer for access to the GPC network. I am getting the following message, “Remove oldest login” or “Remove the oldest user session”.
11.What web browsers are supported?
12.What campuses does this affect?

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1. What is Network Access Control (NAC)?

OIT will require additional steps to access the wired and wireless network to ensure the security of network and computing resources. Network access to services including websites, email, internet/intranet, network shares, and printing will now require the use of authentication (entering a username/password) via Network Access Control (NAC).


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2. Do I need to login to the NAC when using a GPC computer?

Employees that use a GPC owned computer will automatically be given access to the campus network (wired or wireless) when they sign-in to their computers. OIT will begin to deploy an agent program (Cisco Clean Access Agent) that will allow for single sign on from these computers. Should the agent not be installed:
  1. Employees will need to open a web browser (Internet Explorer, Firefox, etc) before network access will be granted.
  2. Upon opening the browser, the employee will be automatically redirected to the NAC login page.
  3. Select the correct provider, GPC Faculty-Staff.
  4. Use the same username/password that you use to login to your GPC computer or email.

GPC employees will then have access to all of the same network and computing resources as before.


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3. Do I need to login to the NAC when using my own personal computer or mobile device?

Yes, employees that use a non-GPC owned computer or mobile device will have to do the following to have access to the wired or wireless network:
  1. Open a web browser.
  2. Then use the same username/password that is used to login to your GPC computer or email and select the correct provider, GPC Faculty-Staff.

GPC web redirect NAC login page.jpg

NOTE: GPC does not provide maintenance or instruction on how to use an employee's personal computer or mobile device.


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4. When I use my own personal computer or mobile device I am not automatically directed to the NAC login page when opening my web browser. How do I login?

If your browser does not automatically take you to the NAC login page, try entering an address into the address bar such as http://www.google.com

If that does not work, close your browser and try again.

NOTE: GPC does not provide maintenance or instruction on how to use an employee's personal computer or mobile device.


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5. What is the Cisco Clean Access Agent?

The Cisco Clean Access Agent is a small application installed on GPC owned computers that will allow employees to seamlessly login to their computer and the NAC at one time. Employees will only have to login to their GPC computer and the Cisco Clean Access Agent will authenticate them on the NAC.
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6. Who needs the Cisco Clean Access Agent?

Employees using GPC owned computers will automatically have the Cisco Clean Access Agent installed.

If you should find that the agent is not installed, please contact the helpdesk. 678-891-3460 or helpdesk@gpc.edu

Employees, students, and guests using their personal computer or mobile device do not have to have the Cisco Clean Access Agent.


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7. How do I know if I have the Cisco Clean Access Agent?

GPC computers with Microsoft Windows will show the Cisco Clean Access Agent Cisco Clean Access Agent icon in system tray in the System Tray. The System Tray is located in the lower right corner of your desktop.


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8. Are there time limits on accessing the GPC network after sucessfully authenticating with the NAC?

Yes. There are time limits on how long a user can access the GPC network after successfully authenticating with the NAC.

Session limits are based on the following roles:
1. GPC Faculty and Staff - 12 hours
2. GPC students - 4 hours
3. GPC guests - 8 hours

You will have to re-authenticate against the NAC once the session limit is reached.


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9. How many computers/ devices can I have logged into the NAC at one time?

Based on your role within GPC, there are limits on the number of computers that you can log into simultaneously for access to the GPC network.
1. GPC Faculty and Staff can log into two separate machines simultaneously for acccess to the GPC network.
2. GPC students can only login into one machine simultaneously for acccess to the GPC network.
3. GPC guests can only login into one machine simultaneously for acccess to the GPC network.


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10.I am trying to log into a computer for access to the GPC network. I am getting the following message, “Remove oldest login” or “Remove the oldest user session”.

If you are getting the message, “Remove oldest login session” via the Cisco Clean Access Agent or “Remove the oldest user session” on the GPC NAC login web page, you have exceeded the number of simultaneous logins allowed.

If you received this message when you were redirected to the GPC NAC login web page, follow the directions as listed:

Web Agent multiple session warning.jpg

  1. Check "Remove the oldest user session"
  2. Authenticate with your GPC username and password
  3. Choose the appropriate network provider.

 You will have access to the GPC network upon successful authentication.

If you are receiving this message when you login from your GPC owned computer via a Cisco Clean Access Agent warning, follow the directions as listed below:

  • Choose "Remove oldest login session”.
  • Click "Continue".
  • If you logged into the computer with your GPC username and password, the Cisco Clean Access Agent warning will dissappear and you will have access to the GPC network.
    If you did not use your GPC username and password to log into the computer, then the Cisco Clean Access Agent will prompt you for a login.
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    11. What web browsers are supported?

    Supported Browsers (Windows)
    IE6, IE7, Firefox 2

    Supported Browsers (Mac)
    Safari 3, Firefox 2


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    12.What campuses does this affect?

    Network Access Control will only affect employees and students that physically come to the following locations:
    • Clarkston
    • Decatur
    • Dunwoody
    • Newton
    • Lakeside
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