On Wed, Mar 08, 2006 at 11:25:38AM -0600, Steven W Smith wrote:
> # Reference 1
> data = recv(socket: soc, length: 2048, timeout:20);
> display(data);
>
> # Reference 2
> send(socket:soc, data: string("HELO Mydomain.com"+'\n'));
> data = recv(socket: soc, length: 2048, timeout:20);
> display(data);
...
> Now, it works fine against a Sendmail server; however, when I run it
> against an ESMTP server (Win 2K is the test server), the code acheives
> "Reference 1" and displays the login banner. When I get to "Reference 2",
> the socket is as dead as a post.
Define "dead as a post". Has the socket been closed or do you just fail
to get a response from recv()?
> I can telnet to the server and issue the "HELO" just fine. I can also
> configure a client such as Evolution and it works perfectly. When I
> inspect the server log, I see that the NASL script's connection was
> established followed by an immediate "QUIT" that I didn't send. The
> "recv" following "Reference 2" times out and no data are displayed.
Have you verified what's actually sent with a packet dump? Do you have a
firewall in front of the Win 2K server that is filtering traffic to the
SMTP port?
> I don't know where to begin looking for a solution.
RFC 821 specifies that lines end with CR/LF. Assuming you're not leaving
out the linefeed on purpose, perhaps the creators of your SMTP server
didn't know about the old maxim about "be generous in what you accept".
George
--
theall@private
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