I wanna learn about iptables but don’t know where to start, this post perhaps will be my collection of link around iptables.
Perhaps I can learn it by doing
Tutorial :

Frozentux iptables tutorial (cool)
Using Linux iptables or ipchains to set up an internet gateway / firewall / router for home or office
Serve Path Iptables
Secure your [...]

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Subject: In Memoriam: Jun-ichiro Hagino
Date: Tue, 30 Oct 2007 14:10:58 -0700
From: Dragos Ruiu <dr@kyx.net>
Organization: All Terrain Ninjas
To: bugtraq@securityfocus.com
With great sadness, I regret to inform you that Itojun
will not be presenting his great knowledge of IPv6 at
PacSec. I have been informed by several sources
that he passed away yesterday.
Funeral services will be held on Nov [...]

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After read this article I try to practice in other server that has gigabit ethernet card .
I have download opensuse 10.3 in Gnome and KDE version and use it as sample stuff for sending via scp.
sending before tuning :
monitor# scp openSUSE-10.3-GM-GNOME-i386.iso mother@172.88.1.3:/home/mother
Password:
openSUSE-10.3-GM-GNOME-i386.iso                                                             100%  665MB  10.2MB/s   01:05
ftp# sysctl kern.ipc.maxsockbuf=262144
ftp# sysctl net.inet.tcp.sendspace=65536
ftp# sysctl net.inet.tcp.recvspace=65536
ftp# sysctl net.inet.tcp.rfc1323=1
monitor# scp [...]

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