netstat -an ought to do it.
Tony
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of
> Sean E. Covel
> Sent: Saturday, June 09, 2001 14:52
> To: [EMAIL PROTECTED]
> Subject: [Leaf-user] Firewall testing
>
>
> I've been conversing with the "Expert Team" at PC Flank
> (http://www.pcflank.com./) about their scanner. So far they
> have asked
> for additional information about my firewall, but have not
> defended the
> results.
>
> So.... How can I verify that a certain port is/is not open?
> The report
> I got noted port 3128 (which Firewall Forensics says is "squid") was
> "open". Later in the report it said all the trojan ports were open
> (27374, 12345, 1243, 31337, 12348) (I doubt it!) How can I be sure?
>
> As far as the "spoofing" and why they would want to do it... Anyone
> running portsentry? Ever gone up against "Shields Up" or
> "DSL Reports"
> tests? What happens? After a few scans from the same IP, they end up
> in hosts.deny and a firewall rule is added, both automatically. Once
> that is done, further scanning is moot. My first run against PcFlank
> noted more ports open than what I listed above, so I checked out my
> network.conf. The variables EXTERN_UDP_PORTS and EXTERN_TCP_PORT had
> some ports listed (_domain _ntp _bootpc)(_smtp). I cleaned those up
> (had to leave _bootpc(?) for dnsclient) and the next scan listed fewer
> ports. Neither "Shields Up" or "DSL Reports" got far enough along in
> their scans before portsentry kicked in to see those other ports!
>
> So, once again, how do I tell for sure if the above listed ports are
> open/visible/stealth?
>
> Thanks,
>
> Sean
>
> P.S. Did you run the "advanced" test. Take a look at your
> logs. What
> a mess! What does it all mean. Did LRP really pass the test?
>
>
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