Re: IIS 6.0: How to add isapi filter?

From: Wade A. Hilmo [MS] (wadeh_at_microsoft.com)
Date: 01/28/05 

Date: Fri, 28 Jan 2005 07:50:20 -0800

Hi Paul,

A. As I explained in my previous post, the worker process (which is where
your filter is loaded) is not started until it's needed. You have to make a
request.

B. "Web Services Extensions" has nothing to do with filters. The entries
that you see for ASP.NET and ASP are for extensions.

Thank you,
-Wade A. Hilmo,
-Microsoft

PS: The MMC snap-in is not a very good way to determine the status of your
filter in IIS 6. The issue is that IIS 6 can have many worker processes and
it's possible that the filter may load in some, but not others - yet the UI
has no way to convey this information. All the UI does is check a single
flag in the metabase for the filter state. Again, as I posted, if a worker
process is unable to load a filter, then it will fail to start and an event
will be written to the event log.

"PaulT" <pthakur@apsc.com> wrote in message
news:#6i6VQMBFHA.3588@TK2MSFTNGP11.phx.gbl...
> If the process is same as in IIS 5.0, then:
> A. I should be able to add a filter via the web site property page under
the
> Isapi Filter Tab and there is no need to setup anything for this filter
> under the Web service Extensions, True? Why then I don't see the GREEN up
> arrow under the status in ISM same as in IIS 5.0?
>
> B. How is "Web Services Extensions" used, when do you add a filter there?
I
> see it has ASP.NET and ASP Pages in there with status allowed.
>
> Thanks for your help.
> Paul
>
>
>
>
> "Wade A. Hilmo [MS]" <wadeh@microsoft.com> wrote in message
> news:%23DOutuLBFHA.3820@TK2MSFTNGP11.phx.gbl...
> > Hi Paul,
> >
> > How are you determining that the filter is not loading?
> >
> > The process of installing a filter in IIS 6 is exactly the same as 5.
> There
> > are two differences, though. First off, IIS 6 does not start a worker
> > process until it's needed to handle a request. Because of that, it may
be
> > necessary to actually make a request to the site in which you are
> installing
> > the filter so that the process starts. Second, it is possible that the
> > worker process may not have sufficient rights to the metabase key that
> > stores the flag that the filter is loaded. In this case, the MMC snapin
> > might report the filter as unloaded when it's really there. Note that
> I've
> > only seen this happen when someone has applied either custom ACLs to the
> > metabase, or when they are running the worker process with a customer
user
> > account.
> >
> > The filter is configured to load, and fails. There are two things that
> will
> > happen. First, IIS will write and event to the log. Second, the worker
> > process will fail to start (a new feature in IIS 6 is that all filters
> must
> > load, in order for process initialization to succeed.)
> >
> > Thank you,
> > -Wade A. Hilmo,
> > -Microsoft
> >
> > "PaulT" <pthakur@apsc.com> wrote in message
> > news:uL0gfOKBFHA.2076@TK2MSFTNGP15.phx.gbl...
> > > In IIS 5.0, adding an isapi filter was straight forward via ISM Admin
> tool
> > > using property pages. I tried the same steps in IIS 6.0, however I
can't
> > get
> > > the filter to load. Is there something that needs to be
setup/configured
> > > else where:
> > >
> > > 1. Web Service Extensions?
> > > I even changed the status to "Allowed" for "All unknown isapi
extension"
> > and
> > > CGI extensions, didn't help.
> > >
> > > 2. Do I need to setup a Web Service Extension first and then add the
> isapi
> > > filter on a web site via web site property page. I did try that, no
> > effect.
> > > I am not sure how the Web Service Extensions as setup in IIS 6.0 get
> > related
> > > to the isapi filter entry in the property page of a web site other
than
> > > pointing to the same physical path for the executable. How do I relate
a
> > > specific Web Service Extension to selected web sites?
> > >
> > > I don't want this filter to apply to all sites.
> > >
> > > I did restart IIS multiple times after each change just incase taht
made
> a
> > > difference.
> > >
> > > Any help will be appreciated.
> > > Thanks,
> > > Paul
> > >
> > >
> >
> >
>
>

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