On Monday 07 June 2004 12:28, Martin Mačok wrote:
> On Mon, Jun 07, 2004 at 11:40:59AM +0300, Noam Rathaus wrote:
> > I noticed a very inconsitent (with the man file) behavior of Nmap,
> > I run two command line:
> > 1) ./nmap-3.50/nmap -PT80 -sP -d -n www.microsoft.com
> > (under the root user)
> > 2) /nmap-3.50/nmap -PT80 -sP -d -n www.microsoft.com
> > (under the non-root user)
> >
> > Both should do the same, TCP Ping the host www.microsoft.com,
>
> Option -PT does not do the same for root and non root users. From the
> man page, option -PT: "... spew out TCP ACK packets ... For non root
> users, we use connect()".
>
> Sniff both (1) and (2) with tcpdump/ethereal and see the
> conversations.
>
> Martin Mačok
> IT Security Consultant
>
Also, I noted that it still creates an ICMP capture filter under root, which
would in the case of -PT/-PS/etc be unnecessary, unless that host is
non-routeable.
I tried in addition to do:
nmap -sP -PS80 -d www.microsoft.com
TCP probe port is 80
Starting nmap V. 2.54BETA31 ( www.insecure.org/nmap/ )
The first host is 203, and the last one is 203
The first host is 55, and the last one is 55
The first host is 30, and the last one is 30
The first host is 222, and the last one is 222
Packet capture filter: (icmp and dst host 207.46.245.92) or (tcp and dst host
192.117.122.128 and ( dst port 62241 or dst port 62242 or dst port 62243 or
dst port 62244 or dst port 62245))
As you can see it still tries to use ICMP for detection, if I read it
correctly.
--
Thanks
Noam Rathaus
CTO
Beyond Security Ltd.
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Received on Jun 07 2004
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