Transcript CCNA4Preso

Networking in a Linux Environment
Pete Eby
Dan Thomas
Robert Zurawski
Why Linux?
60% of web hosting is Linux based
Linux is Open Source
As effective as paid solutions
Free to change for your needs – scalable
Widely supported

Nagios
Network Monitor
Easy integration into existing networks
GUI can immediately alert you to network errors
Supports server, client, printer, and service
monitor
Can use environment sensors as well

Cacti
Network statistics tool
Uses Round Robin Archives
MySQL & PHP Based – Customizable
Robust and precise graphs
Highly configurable
Great network management tool

Nmap/Zenmap

Network security auditing tool
Find live hosts, report on any services that are
running, detect the OS of the scanned
system, and report on the version of the OS
and services detected

Strong port scanner
Highly configurable
Helps to harden your network from
attacks

Iptraf
Reports network traffic

Supports a wide range of traffic including: IP,
TCP, UDP, ICMP, IGMP, IGP, IGRP, OSPF,
ARP, and RARP
Interfaces supported: loopback, ethernet, FDDI,
SLIP, Async PPP, Sync PPP over ISDN, ISDN
IP encapsulation, ISDN Cisco HDLC
encapsulation, and Parallel line IP
Useful tool for determining what traffic is
traveling on the network and where
it is going

Mtr
Combination of ping and traceroute
Mtr reports: current, last, best, and worse
latency, loss percentage, and sent packets to
each hop that is taken to the destination
Allows troubleshooting of any links that are
down or might be running slow

Linux Distros
Sources
http://distrowatch.com/
http://www.ubuntu.com/getubuntu/download
Nagios
Cacti
nmap
Iptraf
mtr
http://www.nagios.org/
http://www.cacti.net/
http://nmap.org/zenmap/
http://iptraf.seul.org/
http://winmtr.sourceforge.net/