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--- Begin Message ---
--- rajat swarup <rajats@gmail.com> wrote:
> On 8/8/07, Nikhil Wagholikar <visitnikhil@gmail.com>
> wrote:
> >
> > Thanks for your suggestion. However as I said
> earlier that "if suppose SMTP is
> > configured on port 26 instead of traditional port
> 25, then it would
> > add a twist to this situation". Hence your
> suggested method would
> > still leave some hosts down. Can you kindly
> further granularize your
> > suggestion?
>
> But it would turn up with port 25 as "closed" which
> still shows that
> the host is alive.
Or not! The fw can be configured not to respond in
case that a port is closed. In this situation nmap
reports the port as "filtered" and you can't tell if
the host is up. In fact, a live host with no ports
open and with a fw configured to reject icmp can
appear as offline.
> --
> Rajat Swarup
>
> http://rajatswarup.blogspot.com/
>
>
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