Der Paketfilter bei OpenWrt
Der Paketfilter bei OpenWrt
Über das Buch
OpenWrt bietet sich als alternatives Betriebssystem an für SOHO-Router, die nicht mehr oder zu selten aktualisiert werden. Aufgrund seiner Modularität eignet es sich auch für andere Projekte mit der unterstützten Hardware. Somit sind die Hürden, einen Router mit OpenWrt zu betreiben, sehr gering.
Dabei sollte nicht außer Acht gelassen werden, dass mit einem schlecht gewarteten Router sehr leicht beinahe jeder Zugriff auf die angeschlossenen Netzwerke und die darin enthaltenen Geräte erlangen kann.
Hier kann man mit dem in OpenWrt enthaltenen Paketfilter regulierend eingreifen.Wenn man die nötigen Kenntnisse besitzt.
Das ist das zentrale Thema des Buches: es will die nötigen Kenntnisse zum verantwortungsvollen Betrieb einer Paketfilter-Firewall, speziell mit Linux und insbesondere bei OpenWrt vermitteln. Dementsprechend sind die Schwerpunkte des Buches:
- grundlegende Kenntnisse über IP-Netzwerke für den Betrieb einer Paketfilter-Firewall,
- die Wirkungsweise des Netfilter-Systems bei Linux und
- die Konfiguration von Netfilter bei OpenWrt.
Ergänzt wird das Buch durch einige Kapitel, die sich speziellen praktischen Fragen rund um den Betrieb einer Paketfilter-Firewall mit OpenWrt widmen.
License
Über den Autor
Inhaltsverzeichnis
-
- Vorwort
-
Allgemeine Fragen
- Was ist OpenWrt?
- Was kann ich damit machen?
- Möglichkeiten und Grenzen
- Alternativen zum OpenWrt-Paketfilter
-
Grundlagen Netzwerkprotokolle
- Aufgaben eines Paketfilters
- Um welche Protokolle geht es?
- IPv4 für den Firewall-Administrator
- IPv6 für den Firewall-Administrator
- Gleichzeitiger Betrieb von IPv4 und IPv6
- ICMP und IGMP
- ICMPv6 für den Firewall-Administrator
- Network Address Translation
-
Grundlagen OpenWrt Paketfilter
- Netfilter: Kernel-Komponenten
- Netfilter: Benutzerprogramme
- Besonderheiten des Linux-Kernels
- Ein Modell der Firewall-Regeln bei OpenWrt
- Die Webschnittstelle LuCI
- Die zentrale Konfigurationsschnittstelle UCI
-
Praktische Fragen
- Wie ermittle ich meine persönlichen Anforderungen?
- Auswahl von Hardware und Software
- Härten des Systems
- Testen der Firewall
- Monitoring
- Kann ich Paketfilter umgehen?
- Wo platziere ich ein Tunnel-Gateway?
- Wie dokumentiere ich das System?
- Zusätzliche Software
- System aktualisieren
-
Anhang
- Analyse von Iptables-Firewalls
- Risikoanalyse
- Sicherheitsrichtlinien
- Glossar
- Literatur
- Kolophon
- Index
Unterstützte Institutionen
Electronic Frontier Foundation
Defending your civil liberties in a digital world.
https://www.eff.org/Based in San Francisco, EFF is a donor-supported membership organization working to protect fundamental rights regardless of technology.
Die bedingungslose Leanpub, Kein Risiko, 100% zufrieden Garantie
Innerhalb von 60 Tagen ab Kauf kannst du dein Geld zu 100% zurückverlangen, bei jedem Leanpub-Kauf, in nur zwei Klicks. Wir bearbeiten die Erstattungen manuell, daher dauert es ein paar Tage, bis der Betrag ankommt.
Lese die kompletten Bedingungen.
Do Well. Do Good.
Authors have earned$11,974,502writing, publishing and selling on Leanpub, earning 80% royalties while saving up to 25 million pounds of CO2 and up to 46,000 trees.
Learn more about writing on Leanpub
Free Updates. DRM Free.
If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).
Most Leanpub books are available in PDF (for computers), EPUB (for phones, tablets, and Kindle). The formats that a book includes are shown at the top right corner of this page.
Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.
Learn more about Leanpub's ebook formats and where to read them
Top Books
- #1
OpenIntro Statistics
David Diez, Christopher Barr, Mine Cetinkaya-Rundel, and OpenIntroA complete foundation for Statistics, also serving as a foundation for Data Science.
Leanpub revenue supports OpenIntro (US-based nonprofit) so we can provide free desk copies to teachers interested in using OpenIntro Statistics in the classroom and expand the project to support free textbooks in other subjects.
More resources: openintro.org.
- #2
A Guide To The Future Of Hospitals
Dr. Bertalan MeskoFor centuries, scientists have been trying to envision the future of hospitals. Following the recent shift towards digital health technologies, in part precipitated by COVID-19, it is natural for one to wonder how these developments will impact hospitals. What can we expect from them in the future? Will there be hospitals at all in a decade’s time?
- #3
Ansible for DevOps
Jeff GeerlingAnsible is a simple, but powerful, server and configuration management tool. Learn to use Ansible effectively, whether you manage one server—or thousands.
- #4
EZ Tools Manuals
Eric Zimmerman and Andrew RathbunEric Zimmerman's Tools are free, open-source, widely taught around the world. This is the official manual for all of his command line and GUI tools.
- #5
C++20 - The Complete Guide
Nicolai M. JosuttisAll new language and library features of C++20 (for those who know previous C++ versions).
The book presents all new language and library features of C++20. Learn how this impacts day-to-day programming, to benefit in practice, to combine new features, and to avoid all new traps.
Buy early, pay less, free updates.
Other books:
- #6
CCIE SP v5.0
Łukasz Bromirski, Piotr Jablonski, and Nicholas RussoAre you striving to prepare to and pass CCIE SP lab exam? Take the opportunity and get this workbook! With the attached initial cfg files you will prepare yourself for the CCIE SP exam as well as learn SP technologies applicable to all kinds of today modern networks! This workbook covers blueprint topics and provides challenging examples.
- #7
R Programming for Data Science
Roger D. PengThis book brings the fundamentals of R programming to you, using the same material developed as part of the industry-leading Johns Hopkins Data Science Specialization. The skills taught in this book will lay the foundation for you to begin your journey learning data science. Printed copies of this book are available through Lulu.
- #8
Introducing EventStorming
Alberto BrandoliniThe deepest tutorial and explanation about EventStorming, straight from the inventor.
- #9
D3 Start to Finish
Peter CookD3 Start to Finish shows you how to build a custom, interactive and beautiful data visualisation using the JavaScript library D3.js (versions 6 & 7).
The book covers D3.js concepts such as selections, joins, requests, scale functions, events & transitions. You'll put these concepts into practice by building a custom, interactive data visualisation.
- #10
Modern IT Automation with PowerShell
The DevOps Collective, Inc. and Michael ZanattaA PowerShell Textbook written by the community for the community!
Top Bundles
- #1
Software Architecture
2 Books
"Software Architecture for Developers" is a practical and pragmatic guide to modern, lightweight software architecture, specifically aimed at developers. You'll learn:The essence of software architecture.Why the software architecture role should include coding, coaching and collaboration.The things that you really need to think about before... - #2
CCIE Service Provider Ultimate Study Bundle
2 Books
Piotr Jablonski, Lukasz Bromirski, and Nick Russo have joined forces to deliver the only CCIE Service Provider training resource you'll ever need. This bundle contains a detailed and challenging collection of workbook labs, plus an extensively detailed technical reference guide. All of us have earned the CCIE Service Provider certification... - #3
Pattern-Oriented Memory Forensics and Malware Detection
2 Books
This training bundle for security engineers and researchers, malware and memory forensics analysts includes two accelerated training courses for Windows memory dump analysis using WinDbg. It is also useful for technical support and escalation engineers who analyze memory dumps from complex software environments and need to check for possible... - #4
All the Books of The Medical Futurist
6 Books
We put together the most popular books from The Medical Futurist to provide a clear picture about the major trends shaping the future of medicine and healthcare. Digital health technologies, artificial intelligence, the future of 20 medical specialties, big pharma, data privacy, digital health investments and how technology giants such as Amazon... - #8
Statistics - All Lee Baker's Books
10 Books
This bundle includes all of the statistics books that Lee Baker has published at LeanPub 13 Statistics Books*1 PlaceNo Hassle! All in both epub and mobi formats - perfect for all devices and screen sizes. --------------------------------------------------------- *The book listed as Getting Started With Statistics is a bundle of 4 books...
