From: <glassfish_at_javadesktop.org>
Date: Wed, 22 Sep 2010 06:24:48 PDT

I work behind a proxy, and therefore add the properties below to the domain.xml which help.
It's still slow, around 30 seconds to load the admin screen instead of 3 mins.

        <jvm-options>-Dcom.sun.enterprise.tools.admingui.NO_NETWORK=true</jvm-options>
        <jvm-options>-Dhttp.proxyHost=10.0.0.100</jvm-options>
        <jvm-options>-Dhttp.proxyPort=8080</jvm-options>

HTH.
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