build centos image for colinux

manually installing centos 5.2

henry's colinux page, there is a link to centos 5.3 image.

Linux Advanced Routing & Traffic Control HOWTO

Linux Advanced Routing & Traffic Control HOWTO - don't forget read this with Policy Routing With Linux

Policy Routing With Linux

Policy Routing With Linux - Online Edition - nice writing, helpful to under stand/utilize "ip" utility. (or, iproute2 package)

How the Linux kernel works

How the Linux kernel works - a good tutorial for beginner.

Howto block DDOS attacks on Ubuntu

Howto block DDOS attacks on Ubuntu - this ariticle shows the usage of PASD .

What is PSAD ? quoted from its home page:
"psad is a collection of three lightweight system daemons (two main daemons and one helper daemon) that run on Linux machines and analyze iptables log messages to detect port scans and other suspicious traffic. A typical deployment is to run psad on the iptables firewall where it has the fastest access to log data. "

Other tools from the same host:
fwknop - Single Packet Authorization and Port Knocking.

fwsnort - Application Layer IDS/IPS with iptables.

shared library in AIX 5L

Shared library memory footprints on AIX 5L is a good start to understand the shared-library in AIX 5.

trace system calls in aix

follow this, for aix, there are other methods.

1. truss (aix 5L)
2. sctrace (other vendor)
3. ltrace
4. trace (or syscalls(5))