Re: verifying an open or closed port on an ip address

[Bradley Adams <bradley.adams () cas-inc com>]

In-Reply-To: <f81bce7b03194b19ba7ebd9defdf892e.ian () kingcon com>

A great tool that I use for this type of "information gathering" is NMAP. 
Go to http://www.insecure.org It does a lot more than what you want 
however it has a simple command that you can use to see if a single port 
is open on an IP address and you can use other types of "pings" other than 
ICMP such as ACK and SYN. check it out. There is a windows version 
available however I don't know if it does command line. You can always 
install cygwin and emulate a unix/linux box on your windows box... go to 
http://www.cygwin.com then you can use the cygwin unix emulation command 
line version of NMAP.

l8tr
Bradley Adams
bradley.adams () cas-inc com
"You will hardly know who I am or what I mean"
"Linux... Power in the hands of a few"

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> From: "" <ian () kingcon com>
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> Subject: verifying an open or closed port on an ip address
> Date: Thu, 7 Aug 2003 13:44:58 -0400
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> Hello,
>
> I am looking for a windows compatible utility or method, preferably 
command =
> line, where I can verify whether a port on an ip address is reachable or 
not=
> =2E  I want to be able to do individual ports and not port scans=2E  Say 
for=
> instance I wish to verify that port 677 is closed to traffic on ip 
address =
> Ex=2E 172=2E16=2E0=2E1, I'm looking for a utility that would do something 
li=
> ke:
>
> Check 172=2E16=2E0=2E1 port 677
>
> and tell me whether that port was reachable=2E
>
> So if I have two networks and I use this command from one I can determine 
wh=
> ether a port is reachable on another=2E  To determine whether a security 
mea=
> sure is failing or not=2E
>
> There may be a simple way to do this=2E=2E=2E
>
> Thanks
> Ian
> :)
>
>
>
> Go to www=2Emissingkids=2Ecom
>
> But give an' take's the gospel, an' we'll call the bargain fair,=20
> For if you 'ave lost more than us, you crumpled up the square!=20
>
> Mowgli's real Father=2E=2E=2E
>
>
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