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Softpanorama
(slightly skeptical)
Open Source Software Educational Society |
May the
source be with you,
but remember the KISS principle ;-)
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Softpanorama Networking Links
Due to the volume of material all information about Solaris IP configuration is now moved to
network configuration
page.
Notes:
- Those pages are written by people for whom English is not a
native language. Some amount of grammar and spelling errors
should be expected.
- This is a Spartan WHYFF (We Help You For Free) site. It
cannot replace the best teachers and
the
best books.
- The site contain some obsolete pages as it develops like a
living tree... Some links on older pages
are broken. Please
try to use Google, Open directory, etc. to find a replacement link
(see
HOWTO search the WEB for details).
We would appreciate if you can
mail us a correct link.
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31 Jul 2007 | www.ibm.com/developerworks
If you manage systems and networks, you need Expect.
More precisely, why would you want to be without Expect?
It saves hours common tasks otherwise demand. Even if you
already depend on Expect, though, you might not be aware of
the capabilities described below.
Expect automates
command-line interactions
You don't have to understand all of Expect to begin
profiting from the tool; let's start with a concrete example
of how Expect can simplify your work on AIX® or other
operating systems:
Suppose you have logins on several UNIX® or UNIX-like
hosts and you need to change the passwords of these
accounts, but the accounts are not synchronized by Network
Information Service (NIS), Lightweight Directory Access
Protocol (LDAP), or some other mechanism that recognizes
you're the same person logging in on each machine. Logging
in to a specific host and running the appropriate
passwd command doesn't take long—probably only a
minute, in most cases. And you must log in "by hand,"
right, because there's no way to script your password?
Wrong. In fact, the standard Expect distribution (full
distribution) includes a command-line tool (and a manual
page describing its use!) that precisely takes over this
chore. passmass (see
Resources) is a short script written in Expect that
makes it as easy to change passwords on twenty machines as
on one. Rather than retyping the same password over and
over, you can launch passmass once and let your
desktop computer take care of updating each individual host.
You save yourself enough time to get a bit of fresh air, and
multiple opportunities for the frustration of mistyping
something you've already entered.
The limits of
Expect
This passmass application is an excellent
model—it illustrates many of Expect's general properties:
- It's a great return on investment: The utility is
already written, freely downloadable, easy to install
and use, and saves time and effort.
- Its contribution is "superficial," in some sense. If
everything were "by the book"—if you had NIS or some
other domain authentication or single sign-on system in
place—or even if login could be scripted, there'd be no
need for
passmass. The world isn't polished
that way, though, and Expect is very handy for grabbing
on to all sorts of sharp edges that remain. Maybe Expect
will help you create enough free time to rationalize
your configuration so that you no longer need Expect. In
the meantime, take advantage of it.
- As distributed,
passmass only logs in
by way of telnet, rlogin, or
slogin. I hope all current developerWorks
readers have abandoned these protocols for ssh,
which passmasss does not fully
support.
- On the other hand, almost everything having to do
with Expect is clearly written and freely available. It
only takes three simple lines (at most) to enhance
passmass to respect ssh and other
options.
You probably know enough already to begin to write or
modify your own Expect tools. As it turns out, the
passmass distribution actually includes code to log
in by means of ssh, but omits the command-line
parsing to reach that code. Here's one way you might modify
the distribution source to put ssh on the same
footing as telnet and the other protocols:
Listing 1. Modified passmass fragment
that accepts the -ssh argument
...
} "-rlogin" {
set login "rlogin"
continue
} "-slogin" {
set login "slogin"
continue
} "-ssh" {
set login "ssh"
continue
} "-telnet" {
set login "telnet"
continue
...
In my own code, I actually factor out more of this
"boilerplate." For now, though, this cascade of tests, in the
vicinity of line #100 of passmass, gives a good
idea of Expect's readability. There's no deep programming
here—no need for object-orientation, monadic application,
co-routines, or other subtleties. You just ask the computer to
take over typing you usually do for yourself. As it happens,
this small step represents many minutes or hours of human effort
saved.
tutorial
articles in this section describe TCP/IP and related protocols as sequence
diagrams. (The sequence diagrams were generated using
EventStudio System Designer 2.5).
[PDF]
TCP/IP reference card from
SANS
[Dec 6, 2005]
TCP-IP Stack Hardening
[Dec 6, 2005]
Daryl's TCP-IP Primer Good and up-to-date primer...
[Mar 19, 2005]
TCP-IP Protocol
Sequence Diagrams
Articles in this section
describe TCP/IP and related protocols as sequence diagrams.
(The sequence diagrams were generated using
EventStudio).
WANdoc Open Source Perl=based
WANdoc Open Source is free software that generates
interactive documentation for large Cisco networks. It uses syslog and router
configuration files to produce summarized, hyperlinked, and error- checked
router information. It speeds up the WAN troubleshooting process and
identifies inconsistencies in router deployment.
SecuriTeam.com ™ (Archive) - Security News
Understanding IP
Addressing Everything You Ever Wanted To Know - By Chuck Semeria -- good
tutorial from 3COM. This white paper is now
available in the 3 pdf's below.
Pages 1 - 21
Pages 22 - 43
Pages 44 - 65
Top
websites:
TCP/IP online books Free TCP/IP online books
AW • Professional - Networking Series Catalog Page Books
from Addison Wesley, a respected name in technical publication.
Bill Stallings: Home Page Web Site for the Books of
William Stallings
Douglas Comer This is the home page of Douglas Comer, the
author of the book "Internetworking with TCP/IP".
Illustrated TCP/IP Online version of the book "Illustrated
TCP/IP", by Matthew G. Naugle, published by Wiley Computer
Publishing, John Wiley & Sons, Inc.
The Internet Companion Online version of the book "The
Internet Companion". This book explains the basics of communication
on the Internet and the applications available
Internetworking Multimedia This is a online book covering
multimedia communication using the Internet
McGraw Hill Networking books A search on networking books
published by McGraw Hill.
McGraw-Hill - Bet@ Books Free online prerelease versions
of many new books on networking and other topics.
The Mechanics of Routing Protocols An online book
published by Cisco Press.
The Network Book A comprehensive introduction to network
and distributed computing technologies online
Network Reading List: TCP/IP,UNIX and Ethernet Compilation
of links on the Internet relating to TCP/IP, Unix and Ethernet
Networking and Communications Prentice Hall Professional
Technical Reference: Special Interests
Routing in the Internet A very comprehensive book on
routing, written by Christian Huitema, from the Internet
Architecture Board. A must read for those interested on routing
protocols
Routing Information Protocols The Network Book, Chapter 3,
Section 3. This document is part of the Network Book
TCP/IP and Data Communications Administration Guide An
online book, in PDF format, explaining how to setup, maintain and
expand a network using the Solaris implementation of the TCP/IP
protocols
TCP/IP Network Administration, 2nd Edition Clearly
written, this book is a good introduction to the TCP/IP protocols
and practical applications.
Troubleshooting TCP/IP This is a sample chapter from the
book "Windows NT TCP/IP Network Administration", published by
OґReilly and associates which explains how to solve problems related
to TCP/IP in a Windows NT environment
Understanding Networking Technologies Online course
providing training on a host of networking topics.
Windows NT TCP/IP Network Administration O'Reilly
publication covering TCP/IP and NT
Wireless Networking Handbook Online version of the book
"Wireless Networking Handbook" by Jim Geier, and published by New
Riders, Macmillan Computer Publishing
MCI Arms
ISPs with Means to Counterattack Hackers
MCI Arms ISPs with Means to Counterattack Hackers [October
9] MCI introduced today a security product
designed to help Internet Service Providers detect network intruders.
The networkMCI DoS (Denial of Service) Tracker constantly
monitors the network and then once a denial of service attack has been
detected, the product immediately works to trace the root of the attack.
The product is designed to eliminate the time technical
engineers spend manually searching for the intrusion. MCI claims the product
takes little programming knowledge to find the network intruder.
The DoS Tracker combats SYN, ICMP Flood, Bandwidth
Saturation, and Concentrated Source, and the newly detected Smurf hacker
attacks.
"Obviously, we can't guarantee the safety of other networks
from all hacker activity, but we believe the networkMCI DoS Tracker provides
ISPs and other network operators with a powerful tool that will help them
protect their Internet assets," Rob Hagens, director of Internet Engineering.
The product is available for free from MCI's
Web site.
Daryl's TCP-IP
Primer Good and up-to-date primer...
Understanding IP addressing --
tutorial from 3Com
**** The
Network Administrators' Guide -- the first several chapter contain
good introduction to TCP/IP
Contents (fragment)
FAME Computer Education TCPIP for Idiots Tutorial
RFC1180
TCP/IP Tutorial by T. Socolofsky & C. Kale January 1991 (63 KBytes) -- old, but
still decent is a tutorial (UK mirror
RFC 1180)
TCP-IP and IPX
Routing tutorial (mirror
TCP-IP and IPX routing
Tutorial )
Introduction to the Internet Protocols by Charles L. Hedrick.
3 July 1987 (Rutgers University). See also a mirror
Introduction to TCPIP
Fast
Guide to Subnets by Chuck Semeria (3Com)
Understanding IP Addressing
Integrating Your Machine With the Network - good guide from USAIL
PC
Magazine PC Tech (A Beginner's Guide to TCPIP)
IP Masquerading for Linux
Old and broken links
- Data
Communications and TCP/IP
- OSI Tutorial
- TCP/IP Tutorial,
Yale University
- 100-VG-AnyLan
Tutorial, Copyright 1994, U.N.H. InterOperability Lab
- Network
components, routers, switches, hubs etc
- The Network
Management Web Server at Buffalo.edu, Jeff Murphy
- Various white papers, Token Ring
Switching, ATM Update, Ethernet Switching, FTTD, Fiber-to-the-desk, etc.
Anixter Corp.
-
Ethernet Page at University of Texas
- IBM Networking white
papers
- ODI
Overview, © Novell Marketing Group [27K]
-
SNMP Beginners WWW Page, Tyler Vallillee
- Network
cards, jumper settings/details
- A
Brief Tutorial on ATM, © Zahir Ebrahim [41K]
-
Big-LAN's, Campus Networks, etc FAQ
-
Cabling faq
-
Cisco Networking FAQ
- DHCP FAQ, or
HTML version
-
Ethernet Page at University of Texas
- Ethernet FAQ
[71K] or US site
- FDDI FAQ
-
ISDN FAQ, or ISDN FAQ
part 1, 2,
3,
4,
5DN
Fundamentals: © Bell Pacific
- ISDN: What is, ©
John Landwehr, Northwestern University
- Novell Netware
FAQ, © David Rawling
- OSI Tutorial
***+
TCP-IP Tutorial
and Technical Overview -- a pretty decent and up to date IBM Redbook
PDF
Table of Contents (old version was in HTML, now only PDF is
available from the IBM site)
Part 1. Architecture and Core Protocols
Chapter 3.
Routing Protocols
Chapter 4.
Application Protocols
4.1
Characteristics of Applications
Part 2. Special Purpose Protocols and New Technologies
Chapter 8. Internet Protocols and Applications
Chapter 9. Multicast and Multimedia
Chapter 10. Quality of Service
Chapter 11. Availability, Scalability and Load Balancing
Chapter 12. Directory Protocols and Distributed Computing
Part 3. Connection Protocols and Platform Implementations
Cisco materials
Copyright © 1996-2007 by Dr. Nikolai Bezroukov.
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