httpd-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Boyle Owen" <>
Subject RE: [users@httpd] SSL on Virtual Hosts
Date Tue, 28 Oct 2003 13:28:01 GMT
>-----Original Message-----
>From: Larry McFarlane []
>Sent: Dienstag, 28. Oktober 2003 13:20
>Subject: Re: [users@httpd] SSL on Virtual Hosts
>Won't this generate a certificate alert regardless?  For example, my 
>certificate is set for  If I do this for 
>, an alert will popup saying my domain 
>doesn't match 
>the domain on the certificate...

Yes it will. Interestingly, the reason it works at all is due only to
the fortuitous behaviour of apache when faced with a request without a
Host header...

To explain, if you have (unwittingly) set up several name-based SSL VHs
then when you request an arbitrary site, the HTTPS request will arrive
with an encrypted Host header. Apache will therefore default to its
"what-to-do-if-no-Host" behaviour and will go to the FIRST VH in the
config to find a cert. It will therefore use the cert from the 1st VH to
set up the SSL session. This will usually cause a warning such as you
describe. If you accept the warning and continue, an SSL session will be
established and thereafter, apache will be able to read the Host headers
so, oddly enough, the correct website will then be served.

This accidental behaviour sometimes leads people to believe they have
"solved" the problem of SSL NBVH but, although they have ensured
encryption and are seeing the right website, they have not ensured
authentication (as your warning demonstrates).

Encryption is like sending your money to the bank in an armoured car.
Authentication is making sure the car really does go to the bank...

Owen Boyle
Disclaimer: Any disclaimer attached to this message may be ignored. 

>On Mon, 27 Oct 2003 13:26:33 -0800, Roger B.A. Klorese 
><> wrote:
>>> I thought that with namebased virtual hosting that all this could be
>>> accomplished via one ip?
>> The encryption is established before the Host: header is 
>passed in order 
>> to
>> tell the web server which name-based virtual host you want.
>> If you use SSL with name-based virtual hosts, the same cert and name 
>> will be
>> used for all hosts on that IP address.
>> ---------------------------------------------------------------------
>> The official User-To-User support forum of the Apache HTTP Server 
>> Project.
>> See <URL:> for more info.
>> To unsubscribe, e-mail:
>>    "   from the digest:
>> For additional commands, e-mail:
>Using M2, Opera's revolutionary e-mail client:
>The official User-To-User support forum of the Apache HTTP 
>Server Project.
>See <URL:> for more info.
>To unsubscribe, e-mail:
>   "   from the digest:
>For additional commands, e-mail:
Diese E-mail ist eine private und persönliche Kommunikation. Sie hat
keinen Bezug zur Börsen- bzw. Geschäftstätigkeit der SWX Swiss Exchange.
This e-mail is of a private and personal nature. It is not related to
the exchange or business activities of the SWX Swiss Exchange. Le
présent e-mail est un message privé et personnel, sans rapport avec
l'activité boursière de la SWX Swiss Exchange. 


This message is for the named person's use only. It may contain
confidential, proprietary or legally privileged information. No
confidentiality or privilege is waived or lost by any mistransmission.
If you receive this message in error, please notify the sender urgently
and then immediately delete the message and any copies of it from your
system. Please also immediately destroy any hardcopies of the message.
You must not, directly or indirectly, use, disclose, distribute, print,
or copy any part of this message if you are not the intended recipient.
The sender's company reserves the right to monitor all e-mail
communications through their networks. Any views expressed in this
message are those of the individual sender, except where the message
states otherwise and the sender is authorised to state them to be the
views of the sender's company. 

The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:> for more info.
To unsubscribe, e-mail:
   "   from the digest:
For additional commands, e-mail:

View raw message