Download e-book for kindle: SSH: Secure Shell by Daniel J. Barrett

By Daniel J. Barrett

ISBN-10: 3897212870

ISBN-13: 9783897212879

Are you fascinated by community defense? Then try out SSH, the safe Shell, which gives key-based authentication and obvious encryption to your community connections. it really is trustworthy, powerful, and fairly effortless to take advantage of, and either loose and advertisement implementations are largely on hand for many working structures. whereas it does not remedy each privateness and safeguard challenge, SSH removes a number of of them very effectively.Everything you need to find out about SSH is in our moment variation of SSH, The safe Shell: The Definitive Guide. This up-to-date publication completely covers the newest SSH-2 protocol for procedure directors and finish clients drawn to utilizing this more and more renowned TCP/IP-based solution.How does it paintings? each time facts is shipped to the community, SSH instantly encrypts it. while info reaches its meant recipient, SSH decrypts it. the result's "transparent" encryption-users can paintings typically, unaware that their communications are already encrypted. SSH helps safe dossier move among desktops, safe distant logins, and a special "tunneling" power that provides encryption to another way insecure community purposes. With SSH, clients can freely navigate the net, and approach directors can safe their networks or practice distant administration.Written for a large, technical viewers, SSH, The safe Shell: The Definitive Guide covers numerous implementations of SSH for various working structures and computing environments. even if you are someone working Linux machines at domestic, a company community administrator with hundreds of thousands of clients, or a PC/Mac proprietor who simply desires a safe solution to telnet or move documents among machines, our vital consultant has you lined. It begins with uncomplicated set up and use of SSH, and works its technique to in-depth case reports on huge, delicate machine networks.No topic the place or how you are transport info, SSH, The safe Shell: The Definitive Guide will enable you to do it securely.

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Es ist wichtig, sich daran zu erinnern, daß dieser gesicherte Kanal nur zwischen dem SSHClient und dem Server existiert. com nicht gesichert. com ansetzen, einen weiteren gesicherten Kanal erzeugen und so die Kette der gesicherten Verbindungen weiterhin aufrechterhalten. Wir haben hier nur den einfachsten Anwendungsfall von ssh beschrieben. In Kapitel 7 erhalten Sie sehr viel differenziertere Informationen über die zahlreichen Features und Optionen. 1 Dateitransfer mit scp Setzen wir unser Fallbeispiel fort und stellen uns vor, daß Sie beim Lesen Ihrer E-Mail ein Attachment entdecken, das Sie gerne ausdrucken möchten.

Bei traditionellen Paßwort-Schemata pflegt der Server eine sensible Datenbank, die es zu schützen gilt, etwa die Paßwörter selbst oder eine Hash-Variante dieser Paßwörter (wie bei den Unix-Dateien /etc/passwd und /etc/shadow). Diese Daten müssen geheim gehalten werden, weil deren Aufdeckung es Angreifern erlauben würde, sich unter falschen Namen anzumelden oder die Paßwörter durch entsprechende Dictionary-Angriffe zu ermitteln. Der Enwurf von SRP vermeidet eine solche Datenbank und erlaubt weniger zufällige (und dadurch besser zu merkende und nützlichere) Paßwörter, weil er Dictionary-Angriffe verhindert.

Lassen Sie uns einige repräsentative Systeme betrachten. 1 Die rsh-Familie (r-Befehle) Die Unix-Programme rsh, rlogin und rcp – zusammen auch als die r-Befehle bekannt – sind die direkten Vorläufer der SSH1-Clients ssh, slogin und scp. Die Benutzerschnittstellen und die sichtbare Funktionalität sind mit ihren SSH1-Gegenstücken nahezu identisch, nur daß SSH1-Clients sicher sind. Die r-Befehle verschlüsseln aber ihre Verbindungen nicht und besitzen ein schwaches, einfach zu unterlaufendes Authentifizierungsmodell.

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SSH: Secure Shell by Daniel J. Barrett


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