How to Restrict access to MOSS Web Services?

Here is the methode for restrict access to web services in the MOSS.

In order to restrict that we can add an entry in web.config file of that Site Collections web application.
Add the following block

<location path="_vti_bin">
<system.web>
<authorization>
<allow users="sps\user" />
<deny users="*" />
</authorization>
</system.web>
</location>