Skip navigation

JSI Tip 1854. Proxy reports: 87 The parameter Is Incorrect?

If you upgraded SBS to IIS 4.0 and Proxy 2.0, your clients may receive:

Proxy Reports:
87 The parameter is incorrect.
An error occurred while trying to retrieve your URL.

when connecting to a secure web site.

Previous versions of proxy required Sspifilt.dll and W3proxy.dll filter DLLs, which are no longer required. If the registry at:


contains these Filter DLLs, delete the Value Name.

Hide comments


  • Allowed HTML tags: <em> <strong> <blockquote> <br> <p>

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.