Tutorial: SSH-Passwort ändern

20. November 2009 von Christian

Einleitung:

Wir haben alle vor einigen Wochen von dem Niederländischen Hacker gehört, der über das Mobilfunknetz nach offenen SSH-Verbindungen gesucht hat und sich dann mit den Standartdaten (root/alpine) eingehackt hat. Über das Mobilfunknetz ist so etwas bei uns in Deutschland zwar nicht möglich, allerdings empfiehlt sich trotzdem, das Passwort zu ändern und so unbefugte Zugriffe zu verhindern. Das Thema an sich ist zwar schon älter und es gibt auch schon sehr viele Tutorials zu diesem Problem, allerdings ist uns aufgefallen, dass diese häufig fehlerhaft sind.

Ihr benötigt:

iPhone

PC

Cydia iUSB Tunnel
SBsettings
openssh

Vorbereitung:

Zu erst installiert ihr den Tweak SBsettings aus Cydia.

Danach brauchen wir den Tweak  openssh, ebenfalls aus Cydia.

openssh wird anschließend über SBsettings aktiviert.

Als nächstes müsst ihr auf eurem PC das Programm iUSB Tunnel öffnen. Hier öffnen wir zuerst den iTunnel (unter SSH ) und dann PuTTY (wieder unter SSH).

iUSBtunnel

Wichtig: Alle Eingaben in PuTTY werden mit der Enter-Taste bestätigt.

Los geht´s:

Danach öffnet sich folgendes Fenster:

PuttySettings

Nun gehen wir in unserem iPhone / iPod touch unter Einstellungen -> Wi-Fi auf den blauen Pfeil neben unserem Router und tragen die IP-Adresse in PuTTY unter Host Name ein. Daraufhin könnt ihr auf open klicken.

Ihr müsstet nun folgendes Fenster sehen:

PuttyLogIn

Hier gebt ihr nun bei login as (kann durchaus 10sec. dauern bis es erscheint) den Benutzernamen root und als Passwort alpine ein.

So, nun seit ihr via PuTTY in dem Dateisystem eures Devices eingeloggt. Als nächstes gebt ihr den Befehl passwd ein. Daraufhin erscheint im Terminal Fenster (in PuTTY), der Satz Changing password for root. mit der anschließenden Aufforderung new passwort
Hier müsst ihr aufpassen, da das Passwort welches ihr neu eingebt, nicht angezeigt wird. Auch nicht als Sternchen etc.

Nach dem ihr das neue Passwort eingeben habt, müsst ihr dieses, nach der Aufforderung Retype new password noch einmal wiederholen (auch hier wird nichts angezeigt!). Nachdem ihr das gemacht habt, gebt ihr den Befehl exit ein und bestätigt diesen wieder mit Enter.

PuttyRootFertig

Damit habt ihr Teil 1 erfolgreich hinter euch gebracht. Teil 2 besteht aus den gleichen Aktionen, nur mit dem Benutzernamen mobile. Ich denke das ganze muss jetzt nicht nochmal wiederholt aufgeschrieben werden. Aber ich lege ein Bild bei, wo die ganzen Aktionen für den Benutzer mobile nochmal zu sehen sind.

PuttyMobileFertig

Wichtig: Vergesst nicht, openssh nachdem ihr fertig seit, wieder zu deaktivieren. Erst so könnt ihr Hacker angriffen wirklich sicher vorbeugen. Außerdem spart es erheblich Akkuleistung.

122 Kommentare

  1. Sven sagt:

    hehe warum hast du deine interne ip unkenntlich gemacht? ;)

  2. jimmy sagt:

    hab sie schon überall unkenntlich gemacht als mir aufgefallen ist, dass es ja nur die interne IP ist xD.

  3. hAhA sagt:

    Mit Mobile Terminal geht es viel schneller=)

  4. Paulinchen sagt:

    habe ein großes problem.. habe mein passwort von meinen ipod touch vergessen. undja jetzt ist der 20982982 min. (!) das sind 32 jahre ?! deaktiviert. kann meinen ipod ja jetzt auch nicht mehr mit itunes verbinden.. was soll ich jetzt machen ?

  5. Hey Paulinchen,

    was meinst du mit 209829…… ?`Wieso kannst du den iPod nicht mehr verbinden?

    Gruß

    cm

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