Re: port 80 open?
From: Dave (noone_at_nowhere.com)
Date: 03/31/05
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Date: Thu, 31 Mar 2005 11:20:52 -0500
lets get things straight... shields up tests port 80 from outside your
machine to see if you have a program that is listening on that port. this
is normally open if you have a web server installed on your machine, or can
be caused by a trojan/virus/spyware installed on your machine. having a
firewall that blocks incoming connections to your machine on port 80 or not
running a web server should show port 80 as closed or 'stealth' on a check
from shields up or any other outside test.
one thing that may cause a false 'open' report is if your isp is
intercepting incoming connections to prevent you from running a web server.
i understand that instead of just blocking it completely some isp's are
making it look like the port is open, then just dumping whatever comes in.
this would make shields up think the port is open even though it isn't
actually getting to your machine.
this is different from you connecting out to a web server, in that case you
connect from some randomly picked local port number to the remote web server
on port 80. this outgoing connection can also be blocked by firewalls or
other security programs but normally shouldn't unless you don't want to be
able to surf the web. now, some security programs (like zone alarm and nis)
let you block outgoing connections to web servers or other remote services
based on the application that is requesting the connection, that is another
whole layer of security.
"Tom Pepper Willett" <tompepper@mvps.org> wrote in message
news:ehZoGfgNFHA.2964@TK2MSFTNGP10.phx.gbl...
> Outgoing?
>
> Tom
> "Lonewolph" <Lonewolph@discussions.microsoft.com> wrote in message
> news:413D8DA2-B27E-4911-AB6E-9DCC46E032D0@microsoft.com...
> | Then why do friends who have XP who run the Shields UP not show port 80
as
> | open but stealth?
> |
> | "Carey Frisch [MVP]" wrote:
> |
> | > Ports That Are Used by Windows Product Activation
> | > http://support.microsoft.com/default.aspx?scid=kb;en-us;291983
> | >
> | > Periodically, your computer will communicate with the Microsoft
> | > Product Activation servers for verification. You need to keep
> | > Port 80 open.
> | >
> | > --
> | > Carey Frisch
> | > Microsoft MVP
> | > Windows XP - Shell/User
> | > Microsoft Newsgroups
> | >
> | > Get Windows XP Service Pack 2 with Advanced Security Technologies:
> | > http://www.microsoft.com/athome/security/protect/windowsxp/choose.mspx
> | >
> |
>
> --------------------------------------------------------------------------
-----------------
> | >
> | > "Lonewolph" wrote:
> | >
> | > | Running Shields UP!! tells me that I have port 80 open. I am not
> running
> | > | messenger, ftp or any other program that should be accessing the
> internet.
> | > | Should port 80 show as open? I have run Ad-aware SE, McAfee Stinger
> and
> | > | Microtrend's sysclean while in safemode and all have come up blank.
> | > |
> | > | How can I see what processes are using this port? If this port
should
> not be
> | > | open, how can I close it?
> | >
> | >
>
>
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