you need to use URl rewrite in asp.net application
Add the flowing code in web.config
<configuration>
<configSections>
<section name="rewriter"
requirePermission="false"
type="Intelligencia.UrlRewriter.Configuration.RewriterConfigurationSectionHandler, Intelligencia.UrlRewriter" />
</configSections>
<system.web>
<httpModules>
<add name="UrlRewriter" type="Intelligencia.UrlRewriter.RewriterHttpModule, Intelligencia.UrlRewriter"/>
</httpModules>
</system.web>
<rewriter>
<rewrite url="www.zzz.com/abc" to="www.zzz.default.aspx" />
</rewriter>
</configuration>