TriniDBA

So I won't forget where I documented it

Internet Explorer cannot display the webpage When Connecting to OEM

Problem:

After applying latest OS updates (October 9, 2012) on Windows XP SP3, Internet Explorer 7 (IE7) can no longer connect to Oracle Enterprise Manager (11g) via SSL (https). Firefox is able to connect to OEM.

Solution:

Update for Windows XP (KB2661254-V2) affecting certificates. Quick fix: from Add/Remove Programs, check ‘Show updates’, remove Update for Windows XP (KB2661254-V2) and reboot.

Note that removing Windows updates may affect your computer’s security. Proceed at your own risk.

*** UPDATE: Oracle has fixed the issue in MOS ID: 1489557.1 (EM Grid Control 11g Console Not Accessible Via Internet Explorer After Applying Microsoft Security Patches On Client PC)

Reference:

Microsoft Security Advisory (2661254): Update For Minimum Certificate Key Length
http://technet.microsoft.com/en-us/security/advisory/2661254

Microsoft Security Advisory (2749655): Compatibility Issues Affecting Signed Microsoft Binaries
http://technet.microsoft.com/en-us/security/advisory/2749655

The following message is displayed:

Internet Explorer cannot display the webpage 

Most likely causes:
You are not connected to the Internet. 
The website is encountering problems. 
There might be a typing error in the address. 

   What you can try: 
     Diagnose Connection Problems  
     More information 

This problem can be caused by a variety of issues, including: 

Internet connectivity has been lost. 
The website is temporarily unavailable. 
The Domain Name Server (DNS) is not reachable. 
The Domain Name Server (DNS) does not have a listing for the website's domain. 
If this is an HTTPS (secure) address, click Tools, click Internet Options, click 
Advanced, and check to be sure the SSL and TLS protocols are enabled under the 
security section. 

For offline users

You can still view subscribed feeds and some recently viewed webpages.
To view subscribed feeds 

Click the Favorites Center button , click Feeds, and then click the feed you want 
to view. 

To view recently visited webpages (might not work on all pages) 

Click Tools , and then click Work Offline. 
Click the Favorites Center button , click History, and then click the page you want 
to view.

4 responses to “Internet Explorer cannot display the webpage When Connecting to OEM

  1. GaryE October 24, 2012 at 2:31 PM

    Oracle has addressed this problem. See Doc ID 1489557.1:

    Ensure that OMS is patched with PSU3 patch or higher before following the Action plan below
    1. Stop the OMS.
    /bin>emctl stop oms -all
    2. Increase the Certificate key strength for console ports to 2048 bits by using the below command :
    $ cd /bin
    $ ./emctl secure console -self_signed -key_strength 2048
    3. Restart the OMS.
    /bin>emctl start oms
    4.Access the OEM console using Console port only .
    Console will still not be accessible with upload ports as key_strength of upload ports are not changed in this Action plan

  2. Vasudev Seeram October 24, 2012 at 5:17 PM

    Thanks much for the info! (EM Grid Control 11g Console Not Accessible Via Internet Explorer After Applying Microsoft Security Patches On Client PC [ID 1489557.1])

  3. Pingback: Unable to open Oracle Enterprise Manager in Internet Explorer | The IT Bod

  4. minoas December 3, 2012 at 3:54 AM

    What about single type installation without grid control installed? I have a minimal server single instance, no grid etc.

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