Re: open ports 25/tcp and 110/tcp

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On Wednesday 03 December 2003 11:58 pm, David F. Strauch wrote:

> Yes, Antony this is the case.  I have only one WinXP machine that I am
> testing with.  I'm testing the external interface eth0 and I have unplugged
> eth1 from the hub.
>
> When I nmap -sT -p 25,110 -P0 xx.xx.xx.xx I get the following output form
> nmap:
>
> Starting nmap V. 3.00 ( www.insecure.org/nmap )
> Interesting ports on  (67.153.34.147):
> Port       State       Service
> 25/tcp     open        smtp
> 110/tcp    open        pop-3
>
> Nmap run completed -- 1 IP address (1 host up) scanned in 1 second

Well, that just makes no sense to me.   If nmap -sT reports a port open, then 
a telnet to that port from the same machine as the nmap test was done should 
present a welcome banner (for services which provide one, such as SMTP and 
POP3).

Maybe someone else here has a clue what strangeness is going on?

Antony.

-- 
The first fifty percent of an engineering project takes ninety percent of the 
time, and the remaining fifty percent takes another ninety percent of the 
time.

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