Question about Window Scaling

[Shah, Baiju-p98993]

Thank you  Bob for your help.  The net.inet.tcp.rfc1323 was already
enabled but the problem still exists.  Upgrading is not an option as it
is an underlying os for an appliance running Spam Filter software.

-----Original Message-----
From: Bob Middaugh [mailto:bob.middaugh at comcast.net] 
Sent: Thursday, August 30, 2007 11:16 AM
To: Shah, Baiju-p98993; freebsd-questions at freebsd.org
Subject: Re: Question about Window Scaling

Hi Baiju,

Try this to get started:

http://proj.sunet.se/E2E/tcptune.html

http://www.wormulon.net/files/pub/FreeBSD_Network_Tuning_-_slides.pdf

If upgrading is an option:
http://caia.swin.edu.au/reports/070717B/CAIA-TR-070717B.pdf


Hope that helps,
Bob

 -------------- Original message ----------------------
From: "Shah, Baiju-p98993" <Baiju.Shah at gdc4s.com>
> Greetings.
> 
> We currently use Espion appliance running FreeBSD 4.9 as a mail 
> interceptor for SPAM.  We have one customer who has their mail gateway

> hard coded with Window Scaling (WS=9).  Their mail gateway fails to 
> establish SMTP hello connection with WS=9.  However if they set their
Window Scaling to 7, it works.
> 
> Where can I go on the FreeBSD to see its configuration for Window 
> Scale?  How can I modify that configuration?  Please email me with 
> your recommendation to baiju.shah at gdc4s.com. Any and all help are
appreciated.  Thank you in advance.
> 
> 
> Baiju Shah
> Network Security Engineer
> General Dynamics-C4S West
> 8201 E. McDowell Road
> MD: H1217 Scottsdale, Arizona  85257
> Desk: 480.441.9877
> Email: baiju.shah at gdc4s.com
> 
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