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Re: nmap and routing problems
From: David Fifield <david () bamsoftware com>
Date: Mon, 20 Apr 2009 12:15:50 -0600

On Thu, Feb 19, 2009 at 12:13:17PM -0700, David Fifield wrote:
On Thu, Feb 19, 2009 at 08:38:42PM +0200, Peter Gordon wrote:
Progress has been made !

I ran the latest version of nmap -4.85BETA3:
./nmap -e eth0 --unprivileged 10.10.10.71
and received the message "Host seems down".

The problem is with the socket connection. The -e flag doesn't seem to 
be doing anything. What it should be doing is a bind to the IP of the
requested port. 

Without -e option
connect(3, {sa_family=AF_INET, sin_port=htons(80),
sin_addr=inet_addr("10.10.10.71")}, 16) = -1 ENETUNREACH (Network is
unreachable)

With -e option
connect(3, {sa_family=AF_INET, sin_port=htons(80),
sin_addr=inet_addr("10.10.10.71")}, 16) = -1 ENETUNREACH (Network is
unreachable)

I don't think the -e option is supposed to bind to a source address. Try
using -S 10.19.1.30 instead. That should work even as a non-root user.

David Fifield

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