truuk.tex

   1 \begin{frame}[fragile]
   2         \frametitle{Public key authentication}
   3         \pause
   4         \begin{block}{Nut}
   5                 Mogelijk geen wachtwoord en veiliger
   6         \end{block}
   7         \pause
   8         \begin{block}{Command line vlag}
   9                 \lstinline{ssh -i ~/.ssh/keyfile user@server.nl}
  10         \end{block}
  11         \pause
  12         \begin{block}{Config file}
  13                 \lstinline{IdentityFile ~/.ssh/keyfile}
  14         \end{block}
  15 \end{frame}
  16
  17 \begin{frame}[fragile]
  18         \frametitle{Public key authentication}
  19         \framesubtitle{Genereren van een sleutelpaar}
  20         \begin{block}{\$ ssh-keygen}
  21                 \begin{lstlisting}
  22 Generating public/private rsa key pair.
  23 Enter file in which to save the key (/home/user/.ssh/id_rsa):
  24                 /home/user/.ssh/github
  25 Enter passphrase (empty for no passphrase):
  26 Enter same passphrase again:
  27 Your identification has been saved in /home/user/.ssh/github.
  28 Your public key has been saved in /home/user/.ssh/github.pub.
  29 The key fingerprint is:
  30 92:92:6e:b8:3f:d5:76:e8:1b:73:ed:97:c4:e5:87:ba user@system
  31 The key's randomart image is:
  32 +--[ RSA 2048]----+
  33 |                 |
  34 |                 |
  35 |                 |
  36 |     . .        .|
  37 |    o o.S.   . + |
  38 |   o ...+ ..  + o|
  39 |  . o. oo.. .o ..|
  40 |   o.   .+ .. o  |
  41 |  ....  ..  Eo   |
  42 +-----------------+
  43                 \end{lstlisting}
  44         \end{block}
  45 \end{frame}
  46
  47 \begin{frame}[fragile]
  48         \frametitle{Public key authentication}
  49         \framesubtitle{Installeren van een sleutel}
  50         \begin{block}{Publieke sleutel: \textasciitilde/.ssh/github.pub}
  51                 \begin{lstlisting}
  52 ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDBrgcK05XzRRbtmPyXQner5ef8
  53 suOAErDvInRDQbl2bjR0PGizL2t5lM9zE+mS0HHigteGLKma1NxVBBeam0CrodJN
  54 BcW55x3LR/2fLSujUqcloQNwLUpD5da6eGg9yPo1fEaAOK1ssHGA30o6nmDEZEHy
  55 PFgBtPwtDw5TPXPpzslaJx1u7CdeyzqpYsUycxzboy3GBcCsvG4nzD4C9vd0yk5o
  56 jlDeECul4mwyg7NuEjltaY89RzrSa8NtqtURyg/JFQW2IVGe+oBXeTL/eQRuo1Nj
  57 GhYyPm1VMVM+NvaYQZXxGfLpoDoP2V+deD+gP5DuC8WW4LSGnkHKhDEin0Yl mar
  58 t@valhalla
  59                 \end{lstlisting}
  60         \end{block}
  61         \pause
  62         \begin{block}{Geheime sleutel: \textasciitilde/.ssh/github}
  63                 \begin{lstlisting}
  64 -----BEGIN RSA PRIVATE KEY-----
  65 9RnNnrD2DkJBqoX/Aph2wVZg1y/I8t27C7yPR66xUNyHWG4J+k+q7REhA/K4fvjl
  66 NNvNtbc4EeNI+NxaaftH1qo6yBIF5yDwuEYKixeconLCeGl9/exdlyMyXbuuTrU9
  67 d5DgKnWxgJPHnDjmwqTeX3A5S34m/qJKK67IF9WqedeHxeMKzMZYcZpcsFxdvHk/
  68 ...
  69 -----END RSA PRIVATE KEY-----
  70                 \end{lstlisting}
  71         \end{block}
  72         \pause
  73         \begin{block}{Installeren op de server}
  74                 De inhoud van het publieke bestand moet in
  75                 \lstinline{~/.ssh/authorized_keys} komen te staan
  76         \end{block}
  77 \end{frame}
  78
  79 \begin{frame}[fragile]
  80         \frametitle{X forwarding}
  81         \begin{block}{Nut}
  82                 Grafische programma's draaien op een machine die niet perse binnen
  83                 handbereik is.
  84         \end{block}
  85         \pause
  86         \begin{block}{Command line vlag}
  87                 \lstinline{ssh -X user@server.nl}
  88         \end{block}
  89         \pause
  90         \begin{block}{Config file}
  91                 \lstinline{ForwardX11 yes}
  92         \end{block}
  93         \pause
  94         \begin{block}{Caveat}
  95                 Veiligheid
  96         \end{block}
  97 \end{frame}
  98
  99 \begin{frame}
 100         \frametitle{Port forwarding}
 101         \begin{block}{Nut}
 102                 Onversleutelde communicatie versleutelen
 103         \end{block}
 104         \pause
 105         \begin{block}{Command line vlag}
 106                 \lstinline{ssh -L port:host:hostport}\\
 107                 \lstinline{ssh -R port:host:hostport}
 108         \end{block}
 109         \pause
 110         \begin{block}{Config file}
 111                 \lstinline{LocalForward port host:hostport}\\
 112                 \lstinline{RemoteForward port host:hostport}
 113         \end{block}
 114 \end{frame}
 115
 116 \begin{frame}
 117         \frametitle{Agent forwarding}
 118         \begin{block}{Nut}
 119                 Je SSH cache meenemen naar een andere server
 120         \end{block}
 121         \pause
 122         \begin{block}{Command line vlag}
 123                 \lstinline{ssh -A user@system}
 124         \end{block}
 125         \pause
 126         \begin{block}{Config file}
 127                 \lstinline{ForwardAgent yes}
 128         \end{block}
 129 \end{frame}
 130
 131 \begin{frame}
 132         \frametitle{SOCKS proxy}
 133         \begin{block}{Nut}
 134                 Al je internet verkeer via een \textit{vertrouwde} locatie laten lopen
 135         \end{block}
 136         \pause
 137         \begin{block}{Command line vlag}
 138                 \lstinline{ssh -D port}
 139         \end{block}
 140         \pause
 141         \begin{block}{Config file}
 142                 \lstinline{DynamicForward port}
 143         \end{block}
 144         \pause
 145         \begin{block}{Instellen in Chromium}
 146                 \lstinline{chromium --proxy-server="socks5://host:8080" --host-resolver-rules="MAP * 0.0.0.0 , EXCLUDE host"}
 147         \end{block}
 148 \end{frame}
 149
 150 \begin{frame}
 151         \frametitle{Instellen in Firefox}
 152         Edit - Preferences - Advanced - Network - Settings
 153         \includegraphics[width=200px]{./img/firefox_socks.png}
 154 \end{frame}