SCOUG-HELP Mailing List Archives

<< Previous Message << >> Next Message >>

Date:	Sun, 25 Jul 2004 13:54:18 PDT7
From:	"Harry Motin" <hmotin@sbcglobal.net >
Reply-To:	scoug-help@scoug.com
To:	< "scoug-help@scoug.com" > scoug-help@scoug.com >
Subject:	SCOUG-Help: Help with netstat -s

Content Type: text/plain

=====================================================
If you are responding to someone asking for help who
may not be a member of this list, be sure to use the
REPLY TO ALL feature of your email program.
=====================================================

Thanks Peter and Steven. I guess for now, if I restrict all out going communications to
ports 21, 25 and 80 (FTP, SMTP and WWW), that should put my machine at a higher
security level.
HCM

On Sun, 25 Jul 2004 09:00:14 PDT7, Peter Skye wrote:

>=====================================================
>If you are responding to someone asking for help who
>may not be a member of this list, be sure to use the
>REPLY TO ALL feature of your email program.
>=====================================================
>
>Harry Motin wrote:
>>
>> I don't fully appreciate what a socket means, but I'll look it up.
>
>TCP keeps a spreadsheet of all your connections with columns for
>different things such as the IP of the foreign machine. Each row of the
>spreadsheet is a single connection, and these rows are called
>"sockets". That's all that a socket is. It's a row in a spreadsheet.
>
>When your program tells TCP that it wants a connection to the Internet,
>TCP looks at its spreadsheet, finds an unused row, and returns that row
>number to your program with a "your new connection will keep all its
>information in row (socket) number 1357" message. From that point on,
>your program can do anything it wants with the connection but you
>include the row (socket) number in each call to TCP so that TCP knows
>which row in its spreadsheet has all the information.
>
>When you first get a row (socket) in the TCP spreadsheet the entries are
>all blank (zero). After you open the socket, maybe change a few
>parameters (the info is kept in various spreadsheet columns), connect to
>some other machine, send some bytes, then those entries aren't blank
>(zero) any more. "netstat -s" reports the info in the TCP spreadsheet;
>if an entry is blank (zero) then that's what netstat -s displays.
>
>- Peter
>
>
>
>=====================================================
>
>To unsubscribe from this list, send an email message
>to "steward@scoug.com". In the body of the message,
>put the command "unsubscribe scoug-help".
>
>For problems, contact the list owner at
>"rollin@scoug.com".
>
>=====================================================
>
>
>

=====================================================

To unsubscribe from this list, send an email message
to "steward@scoug.com". In the body of the message,
put the command "unsubscribe scoug-help".

For problems, contact the list owner at
"rollin@scoug.com".

=====================================================

Return to [ 25 | July | 2004 ]

SCOUG, Warp Expo West, and Warpfest are trademarks of the Southern California OS/2 User Group. OS/2, Workplace Shell, and IBM are registered trademarks of International Business Machines Corporation. All other trademarks remain the property of their respective owners.