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Re: Changing network ports from closed to stealthed

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On Thu, 30 Jul 2015 20:53:57 +0000, Martin Gregorie wrote:

> On Thu, 30 Jul 2015 19:27:15 +0000, David wrote:
> 
>> I've been using Shields Up to check which ports are visible from the
>> Internet.
>> 
>> With my NAT router set up as normal, all ports show as "stealthed" in
>> Shields Up i.e. a probe to the port gives no response. This is viewed
>> as a good thing.
>> 
>> When I DMZ to my Pi (running a VPN server as a test) I can see all the
>> ports as "closed" apart from the VPN port. As I understand it the Pi is
>> sending a negative response to a request to open the port. This tells
>> the far end that there is a device there managing the ports, which is
>> an invitation to try again and expand the range of ports probed.
>>
> Where did you run this second scan from? Was it another Shields Up!
> scan,
> i.e. the probe came from Gibson's site, or was it run from from
> somewhere else?
> 
> If I want to scan something on my LAN, I run nmap locally.

Both cases running Shields Up from a Windows PC on my local LAN - once 
when there was no DMZ configuration and once when there was.

So same test under two different configurations of the router.

Cheers

Dave R

-- 
Windows 8.1 on PCSpecialist box

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Thread

Changing network ports from closed to stealthed David <wibble@btintenet.com> - 2015-07-30 19:27 +0000
  Re: Changing network ports from closed to stealthed Martin Gregorie <martin@address-in-sig.invalid> - 2015-07-30 20:53 +0000
    Re: Changing network ports from closed to stealthed David <wibble@btintenet.com> - 2015-07-31 10:52 +0000
      Re: Changing network ports from closed to stealthed David <wibble@btintenet.com> - 2015-08-02 16:20 +0000
        Re: Changing network ports from closed to stealthed Martin Gregorie <martin@address-in-sig.invalid> - 2015-08-02 18:42 +0000
          Re: Changing network ports from closed to stealthed Rob <nomail@example.com> - 2015-08-02 19:23 +0000
          Re: Changing network ports from closed to stealthed mm0fmf <none@mailinator.com> - 2015-08-02 20:26 +0100
            Re: Changing network ports from closed to stealthed Martin Gregorie <martin@address-in-sig.invalid> - 2015-08-02 20:08 +0000
            Re: Changing network ports from closed to stealthed The Natural Philosopher <tnp@invalid.invalid> - 2015-08-03 08:34 +0100
          Re: Changing network ports from closed to stealthed Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2015-08-02 19:45 -0400
  Re: Changing network ports from closed to stealthed Rob <nomail@example.com> - 2015-07-30 21:13 +0000
    Re: Changing network ports from closed to stealthed Michael J. Mahon <mjmahon@aol.com> - 2015-07-30 17:12 -0500
      Re: Changing network ports from closed to stealthed Rob <nomail@example.com> - 2015-07-30 22:22 +0000
        Re: Changing network ports from closed to stealthed Michael J. Mahon <mjmahon@aol.com> - 2015-07-30 19:15 -0500
          Re: Changing network ports from closed to stealthed The Natural Philosopher <tnp@invalid.invalid> - 2015-07-31 10:19 +0100
            Re: Changing network ports from closed to stealthed Rob <nomail@example.com> - 2015-07-31 09:33 +0000
              Re: Changing network ports from closed to stealthed The Natural Philosopher <tnp@invalid.invalid> - 2015-07-31 11:23 +0100
              Re: Changing network ports from closed to stealthed David <wibble@btintenet.com> - 2015-07-31 10:57 +0000
          Re: Changing network ports from closed to stealthed David <wibble@btintenet.com> - 2015-07-31 11:07 +0000
            Re: Changing network ports from closed to stealthed Rob <nomail@example.com> - 2015-07-31 11:15 +0000
            Re: Changing network ports from closed to stealthed Roger Bell_West <roger+csrp201507@nospam.firedrake.org> - 2015-07-31 11:22 +0000
            Re: Changing network ports from closed to stealthed Graham. <me@privicy.net> - 2015-08-01 17:03 +0100
            Re: Changing network ports from closed to stealthed druck <news@druck.org.uk> - 2015-08-01 23:30 +0100
  Re: Changing network ports from closed to stealthed druck <news@druck.org.uk> - 2015-07-31 09:46 +0100
    Re: Changing network ports from closed to stealthed The Natural Philosopher <tnp@invalid.invalid> - 2015-07-31 10:13 +0100
      Re: Changing network ports from closed to stealthed I R A Darth Aggie <n0b0dy@invalid.invalid> - 2015-08-02 16:24 +0000
    Re: Changing network ports from closed to stealthed David <wibble@btintenet.com> - 2015-07-31 10:51 +0000

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