While onsite with a client recently setting up NLB on a couple of WFEs using Windows Server2003 x64 R2SP2. I found that after the RSA Authentication Agent 5.3 for Web was installed, the options 'Enable RSA Web Access Authentication Feature Set on This Server' and 'Protect This Resource' were enabled. The 'World Wide Web Publishing' service was restarted, that the 'SecurID Login' would not appear when trying to access any resource. If needed please read my previous blog post on how to configure RSA with SharePoint 2007 "Hint Requires IP Binding"...

The resolution was to manually set the RSA Configuration

For Microsoft Internet Information Services (IIS) 6.0:

1. Open Internet Information Services (IIS) Manager and right click 'Web Sites' folder and select 'Properties'
2. From the 'Web Sites Properties' window, select 'ISAPI Filters' tab
3. Check if the filter name 'RSA SecurID Filter' exists. If not, then add it with the following parameters:
4. Filter Name: RSA SecurID Filter
5. Executable: C:\Program Files\RSA Security\RSAWebAgent\WebID\IISWebAgentIF.dll
6. Click 'OK' to save
7. From the main Internet Information Services (IIS) Manager screen, right click 'Default Web Site' and select 'Properties'
8. Select 'ISAPI Filters' tab
9. Check if the filter name 'RSA SecurID Watchdog' exists. If not, then add it with the following parameters:
10. Filter Name: RSA SecurID Watchdog
11. Executable: C:\Program Files\RSA Security\RSAWebAgent\IISWebAgentCheck.dll
12. Click 'OK' to Save

The issue was that the 'RSA SecurID Filter' was looking in the Program Files (x86) folder for the IISWebAgentIF.dll

It was Cecelia Delgado who resolved the issue.... thank you Cecelia !!! You Rock!!

Hope this helps ...

Cheers,

-Ivan