Firewall Issues

The problem:
Firewall restrictions can sometimes prevent you from logging in to Library resources, resulting in a blank screen after you log in. Some military installations and corporate networks, in particular, have tight firewall restrictions that cause this problem.

Is my access restricted by a firewall - how can I tell?

Please try the following:

  1. First, check your browser.
    Run the Browser Quick Check and verify that your browser has cookies, Javascript and SSL enabled.
  2. Then try our proxy server.
    1. Click this TEST LOGIN link. (Enter your MyUMUC credentials, if prompted.)
    2. Do you then get taken to a page which says "Congratulations"? If so, then your access is OK.
    3. If you get a blank page and do not see the Congratulations message, there may be a firewall blocking your access.
  3. Try another browser on your computer.
    For example, if you are using Internet Explorer, try Firefox or Chrome. Does the same thing happen?
  4. If possible, try another computer on the same network.
    Does that computer also have the same issue?
  5. Still unable to get in?
    If you cannot log into our proxy server, you may have restricted access.

Yes, my access appears to be restricted. What are my other options?

  1. Adjust your firewall settings.
    You may be able to "whitelist" or add a "firewall exception" for the Library server. Check the documentation for your security software about how to do this. Your firewall needs to allow access to the following:
    • Domain:
    • IP address:
    • Ports: 80 and 443
  2. If at work or on a military base, contact your network administrator.
    You might try contacting your network administrator and asking them to allow firewall access to the Library server, and give them this information:
    • Domain:
    • IP address:
    • Ports: 80 and 443
  3. Do you have access to a computer or a network someplace else?
    Can you get in from home or from off-base?
  4. Do you have wireless access?
    If you have a wireless device, can you access UMUC Library databases from it? You might try a hotspot connection (if available) or connect through your wireless carrier.
  5. If at a military installation:
    • Are there any less restricted areas around?
      Depending on the location, some areas of the base – library or recreation areas - may not be as tightly locked down.
    • Does the installation have a library?
      If so, check with the base librarian to see what kinds of resources s/he may know about.
  6. Try free search services.
    Sometimes services, such as the following, will link to free versions of articles.
  7. Found an article you need, but cannot access it?
    Let us know what article you need and that you are at a location with restricted access. We will try to find a copy and e-mail it to you.

Need further assistance?

Ask a Librarian!