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 frobnicator@foobarbaz.com}
  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/frobnicator/.ssh/id_rsa):
  24                 /home/frobnicator/.ssh/github
  25 Enter passphrase (empty for no passphrase):
  26 Enter same passphrase again:
  27 Your identification has been saved in /home/frobnicator/.ssh/github.
  28 Your public key has been saved in /home/frobnicator/.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 frobnicator@foobarbaz
  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 foo
  58 @foobarbaz
  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{Public key authentication}
  81         \begin{block}{\textasciitilde/.ssh/authorized\_keys}
  82                 \begin{lstlisting}
  83 option1="option1value",option2="option2value"...optionn="optionnvalue" ssh-rsa\
  84 AAAB4N.....
  85                 \end{lstlisting}
  86         \end{block}
  87 \end{frame}
  88
  89 \begin{frame}[fragile]
  90         \frametitle{X forwarding}
  91         \begin{block}{Nut}
  92                 Grafische programma's draaien op een machine die niet perse binnen
  93                 handbereik is.
  94         \end{block}
  95         \pause
  96         \begin{block}{Command line vlag}
  97                 \lstinline{ssh -X frobnicator@foobarbaz.com}
  98         \end{block}
  99         \pause
 100         \begin{block}{Config file}
 101                 \lstinline{ForwardX11 yes}
 102         \end{block}
 103         \pause
 104         \begin{block}{Caveat}
 105                 Veiligheid
 106         \end{block}
 107 \end{frame}
 108
 109 \begin{frame}
 110         \frametitle{Port forwarding}
 111         \begin{block}{Nut}
 112                 Onversleutelde communicatie versleutelen
 113         \end{block}
 114         \pause
 115         \begin{block}{Command line vlag}
 116                 \lstinline{ssh -L port:host:hostport frobnicator@foobarbaz.com}\\
 117                 \lstinline{ssh -R port:host:hostport frobnicator@foobarbaz.com}
 118         \end{block}
 119         \pause
 120         \begin{block}{Config file}
 121                 \lstinline{LocalForward port host:hostport}\\
 122                 \lstinline{RemoteForward port host:hostport}
 123         \end{block}
 124 \end{frame}
 125
 126 \begin{frame}
 127         \frametitle{Agent forwarding}
 128         \begin{block}{Nut}
 129                 Je SSH cache meenemen naar een andere server
 130         \end{block}
 131         \pause
 132         \begin{block}{Command line vlag}
 133                 \lstinline{ssh -A frobnicator@foobarbaz.com}
 134         \end{block}
 135         \pause
 136         \begin{block}{Config file}
 137                 \lstinline{ForwardAgent yes}
 138         \end{block}
 139 \end{frame}
 140
 141 \begin{frame}
 142         \frametitle{SOCKS proxy}
 143         \begin{block}{Nut}
 144                 Al je internet verkeer via een \textit{vertrouwde} locatie laten lopen
 145         \end{block}
 146         \pause
 147         \begin{block}{Command line vlag}
 148                 \lstinline{ssh -D port frobnicator@foobarbaz.com}
 149         \end{block}
 150         \pause
 151         \begin{block}{Config file}
 152                 \lstinline{DynamicForward port}
 153         \end{block}
 154         \pause
 155         \begin{block}{Instellen in Chromium}
 156                 \lstinline{chromium --proxy-server="socks5://host:8080" --host-resolver-rules="MAP * 0.0.0.0 , EXCLUDE host"}
 157         \end{block}
 158 \end{frame}
 159
 160 \begin{frame}
 161         \frametitle{Instellen in Firefox}
 162         Edit - Preferences - Advanced - Network - Settings
 163         \includegraphics[width=200px]{./img/firefox_socks.png}
 164 \end{frame}
 165
 166 \begin{frame}[fragile]
 167         \frametitle{Compression}
 168         \begin{block}{Nut}
 169                 Snelheid
 170         \end{block}
 171         \pause
 172         \begin{block}{Command line vlag}
 173                 \lstinline{ssh -C frobnicator@foobarbaz.com}
 174         \end{block}
 175         \pause
 176         \begin{block}{Config file}
 177                 \lstinline{Compression yes}
 178         \end{block}
 179 \end{frame}