From: John Beckett 

"Rich"  wrote in message news::
>    I have seen claims of loopback being blocked.  I'm skeptical.  What I
> would understand is a spoofed loopback address (e.g. 127.x.y.z !=
> 127.0.0.1).  However,  I just tried this on a Windows XP SP2 system and
> I could both listen on and spoof from 127.0.0.x addresses.  Whatever the
> behavior should be identical between the Home and Professional editions
> plus other editions.

The reports on 127.0.0.x problems in XP SP2 are very vague. I think the
claim is that a program can't use 127.0.0.x (where x > 1) to open a
connection.

I'm not sure how an app would bind to (say) 127.0.0.2 - I suppose it might
just be the normal stuff when an app specifies the IP it wants to use,
rather than "any ip". Anyway, then the app (apparently) tries to
open a connection to some other app that is listening on some other IP.
Pretty strange.

John

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