Michael Lazin on 29 Jun 2009 18:30:35 -0700

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Re: [PLUG] Find Open Ports

If I were you I wouldn't portscan your office network,

Have you considered using http://eyeos.org/

It is a cloud computing desktop that you can install on any webserver, written in PHP5

It's not linux, but it has a web browser, and many other apps.  Is port 22 open at your work?  I thought 23 was the telnet port and port 22 was ssh.  I find most anything I want to do can be done with ssh, but if you must have a web browser consider eyeos.  I have a copy in a password protected directory with the .htaccess chowned to root, because I am a little paranoid.  It's something to think about. 


On Mon, Jun 29, 2009 at 9:07 PM, Casey Bralla <MailList@nerdworld.org> wrote:
My employer is very aggressive in closing off ports.  This makes it hard for me
to access my home network from work.  Luckily, port 23 is open so I can ssh
in, and of course, port 80 is left alone.

However, I've got several special web pages that run on computers behind my
firewall.  I access them through port forwarding to non-standard ports (such as
81 & 82).

Unfortunately, since my employer blocks these ports, I can't use them.   I do
have unlimited discretion, however, in assigning my programs to whatever port
I desire.

So....  if I knew which ports were NOT blocked, I could use those.

BUT...  How do I check to see if what ports are available?

So far, I've been able to come up with 2 ideas:  1) scan every port, and 2)
try ports manually one at a time.

I could run a portscan on my portable, but that would undoubtedly raise all
kinds of alarms.  Also, I'd have to be sure I was connecting to something that
had those ports active.

Does anybody have any suggestions on how to test to see if a series of ports
is not filtered, or have a suggestion of ports that I could test manually
through trial and error?

Casey Bralla
Chief Nerd in Residence
The NerdWorld Organisation

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Michael Lazin

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