IIS Server Security - .NET Remoting failed with HTTP 401.5 from IIS 5.0 with NTLM

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Author .NET Remoting failed with HTTP 401.5 from IIS 5.0 with NTLM
Sin Min

2004-04-27, 6:34 am

Good day!

Scenario
----------
Win2k Adv Svr + SP4 + UrlScan + NTLM only (No Anonymous allowed)

Internet <--- resp/ req ---> WebSvr <--- .NET 1.1 Remoting ---> AppSvr (Remote objects in IIS)

As far as I know, the first call to the remote object will failed with HTTP 401.5 before the second try will succeed with HTTP 200 due to NTLM nature.

However, if every call to the remote object returns HTTP 401.5, will it cause the AppSvr to be hung? I noticed from IIS log on the AppSvr that there was a series of HTTP 401.5 before HTTP 500 was returned finally. This event only occured around 10 minutes
before the AppSvr is back to normal operation.

Any idea?
Bernard

2004-04-29, 3:34 am

See reply in mind.com.my

--
Regards,
Bernard Cheah
http://www.tryiis.com/
http://support.microsoft.com/
http://www.msmvps.com/bernard/



"Sin Min" <anonymous@discussions.microsoft.com> wrote in message
news:3CC4C90D-E0DD-49E8-BB63-A24B79B07FE4@microsoft.com...
> Good day!
>
> Scenario
> ----------
> Win2k Adv Svr + SP4 + UrlScan + NTLM only (No Anonymous allowed)
>
> Internet <--- resp/ req ---> WebSvr <--- .NET 1.1 Remoting ---> AppSvr

(Remote objects in IIS)
>
> As far as I know, the first call to the remote object will failed with

HTTP 401.5 before the second try will succeed with HTTP 200 due to NTLM
nature.
>
> However, if every call to the remote object returns HTTP 401.5, will it

cause the AppSvr to be hung? I noticed from IIS log on the AppSvr that there
was a series of HTTP 401.5 before HTTP 500 was returned finally. This event
only occured around 10 minutes before the AppSvr is back to normal
operation.
>
> Any idea?



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