Re: [lvs-users] Random "Page cannot be displayed" with IE and SSL throug

To: " users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: [lvs-users] Random "Page cannot be displayed" with IE and SSL through LVS loadbalancing
From: "Daniel Kerrutt" <d.kerrutt@xxxxxxxxxxxxxx>
Date: Thu, 26 Jun 2008 13:44:44 +0200
On Wed, Jun 25, 2008, Joseph Mack NA3T wrote:
> On Wed, 25 Jun 2008, Daniel Kerrutt wrote:
>> Hi -
>> I posted this subject to microsoft.public.internetexplorer.general,
>> but wanted to ask for help here, too.
>> I have a problem while connecting to a loadbalanced website via SSL.
>> Sometimes IE is displaying an "Page cannot be displayed" error
>> message. Sometimes the error is happening instantly, sometimes after
>> entering the URL 3-4 times.
>> Server software is Apache 2.2 / mod_ssl
>> Keep-Alive is forced to turn off with the following configuration
>> statement with SSL connections:
>> SetEnvIf User-Agent ".*MSIE.*" nokeepalive ssl-unclean-shutdown
>> downgrade-1.0 force-response-1.0
> Graeme replied to a similar problem on 22 May (IE and
> apache/ssl). Go look in the archives.

The problem described there sounds very similar.

> the source of the problem is described here.
> I don't know why this is a problem through a director, but
> not connecting directly, so I may not understand the problem

Thanks for the link.

The problem is definitly only while connecting through LVS.
One problem described in the modssl FAQ is about the SSL session cache.

Maybe there is a bug in IE because every request is directed to a
different realserver, but IE is relying on SSL session cache reuse
like described in the FAQ.

I don't know the details how SSL session cache is working - but provided
that the connection is working fine when connecting directly,
this might be the source.


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