Date: Thu, 20 Aug 1998 10:05:27 +0200 From: "Kevin Kyeong-il CHOI" <kevin.choi@cnes.fr> To: "Roland Yeo" <roland@cir.nus.edu.sg>, "Doug White" <dwhite@resnet.uoregon.edu>, "Kevin M. Lahey" <kml@nas.nasa.gov> Cc: "FreeBSD Question" <freebsd-questions@FreeBSD.ORG> Subject: Re RE: Questions on TCPDUMP, TCP Window Size Message-ID: <000301bdcc11$4b288920$52099584@pc-kichoi.cst.cnes.fr> In-Reply-To: <199808182127.OAA18841@gecko.nas.nasa.gov>
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Dear Roland, Kevin & Doug,
Thanks all of you.
It works.
As resume, to make the RFC 1323 work,
(1) I changed 'tcp_extensions=YES' in rc.conf
(2) I also made the socket buffer sizes bigger;
sysctl -w kern.maxsockbuf=1000000
sysctl -w net.inet.tcp.sendspace=500000
sysctl -w net.inet.tcp.recvspace=500000
Then it shows effectively wscale option in SYN packet.
And to make TCPDUMP work,
(1) I added in kernel config file,
pseduo-device bpfilter 4
(2) then rebuilt the kernel.
It works perfectly.
My FreeBSD is 2.2.6, so it proves the above system variables
exist.
Furthermore, if anyone had already tried to install "dummynet"
package, I'd like to listen to your opinion before I enter into
that.
Thanks all, and thanks in advance. ;)
-------------------------------------
Kevin Kyeong-il CHOI
~'/ (o\)
^
\___/o
Doctoral Research Engineer
Service DEE/IR/TL/ES
Centre National d'Etudes Spatiales
18 Avenue Edouard-Belin
31401 Toulouse cedex 4
France
(T) +33-561 28 15 31
(F) +33-561 28 29 13
(Email) kevin.choi@cnes.fr
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