Article ID: 152589
Article Last Modified on 2/20/2002
APPLIES TO
- Microsoft Internet Information Server 1.0
This article was previously published under Q152589
SYMPTOMS
When you use a Netscape Navigator 2.01 client to view a SSL protected web
page with graphics on Internet Information Server (IIS), the Netscape
client may appear to hang. However, after 15 minutes of inactivity, the
client will suddenly display the entire page with all the graphics.
CAUSE
Netscape Navigator 2.01 clients do not support HTTP Keep-Alives over SSL
connections.
WORKAROUND
Disable HTTP Keep Alives on the IIS computer by doing the following:
WARNING: Using Registry Editor incorrectly can cause serious, system-wide
problems that may require you to reinstall Windows NT to correct them.
Microsoft cannot guarantee that any problems resulting from the use of
Registry Editor can be solved. Use this tool at your own risk.
- With Registry Editor, go to the following registry key
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W3SVC\Parameters
- Click Add Value on the Edit menu. Add the following:
Value Name: SslNoKeepAlive
Data Type: REG_DWORD
Data: 1
- Stop and restart all of the IIS services.
Notes:
- Unfortunately, disabling HTTP Keep Alives has severe performance
implications as it disables HTTP Keep Alives completely, even for
non-SSL pages.
- Microsoft has changed IIS to only use HHTP Keep Alives over SSL with
browsers known to be compliant, currently the only known compliant
browser is Microsoft Internet Explorer.
STATUS
Microsoft has confirmed this to be a problem in Microsoft Internet
Information Server version 1.0. This problem was corrected in the latest
Microsoft Internet Information Server U.S. Service Pack.
The service pack for IIS 1.0b systems using 64-bit SSL keys is available
from Microsoft's World Wide Web at the following location:
If you require information on obtaining the domestic version of the service
pack (support for 128-bit keys), consult the Readme.htm file located at
http://www.microsoft.com/infoserv/readme.htm.
This problem was also corrected in the latest Windows NT 3.51 U.S. Service
Pack. For information on obtaining the Service Pack, query on the
following word in the Microsoft Knowledge Base (without the spaces):
Additional query words: ssl netscape internet browser hang freeze post method form navigator prodiis
Keywords: kbnetwork KB152589