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1.1.1.2 ! misho       9: <A HREF="mpd.html"><EM>Mpd 5.7 User Manual</EM></A>
1.1       misho      10:  <b>:</b> <A HREF="mpd17.html"><EM>Configuring Mpd</EM></A>
                     11:  <b>:</b> <A HREF="mpd24.html"><EM>Compression (CCP) layer</EM></A>
                     12:  <b>:</b> <EM>MPPC protocol</EM><BR>
                     13: <b>Previous:</b> <A HREF="mpd24.html"><EM>Compression (CCP) layer</EM></A><BR>
                     14: <b>Next:</b> <A HREF="mpd26.html"><EM>IPCP layer</EM></A>
                     15: 
                     16: 
                     17: <HR NOSHADE>
                     18:   <H2><A NAME="25"></A>4.6.1. MPPC protocol<A NAME="mppc"></A></H2>
                     19: <p>  
                     20: Mpd implements Microsoft Point-to-point compression (MPPC)
                     21: CCP subprotol. To enable it, 'mppc' option should be enabled at the CCP layer.</p>
                     22: <p>MPPC CCP subprotocol consists of MPPC compression and MPPE encryption parts.
                     23: To make MPPC CCP actually do something you should enable some of them using
                     24: options below.</p>
                     25: <p>
                     26: <dl>
                     27: 
                     28: <dt><b><code>set mppc accept <em>option ...</em> </code></b><dd>
                     29: <dt><b><code>set mppc deny <em>option ...</em> </code></b><dd>
                     30: <dt><b><code>set mppc enable <em>option ...</em> </code></b><dd>
                     31: <dt><b><code>set mppc disable <em>option ...</em> </code></b><dd>
                     32: <dt><b><code>set mppc yes <em>option ...</em> </code></b><dd>
                     33: <dt><b><code>set mppc no <em>option ...</em> </code></b><dd>
                     34: <p>These commands configure various MPPC options.</p>
                     35: 
                     36: <dt><b><code>compress</code></b><dd><p>Enables MPPC compression. This is the only compression method supported by 
                     37: Microsoft Windows RAS.</p>
                     38: <p>Note: This option requires ng_mppc node to be built with compression support,
                     39: which is disabled by default, requiring external compressor code.
                     40: Open-source implementation of this code, based on RFC2118, could be found
                     41: at http://mavhome.dp.ua/MPPC/. But MPPC compression algorithm itself covered
                     42: by US patent, so you may need to contact Hi/Fn Inc. to obtain their proprietary
                     43: implementation.
                     44: If kernel support is not detected, compression will not be negotiated.
                     45: Use 'show version' command to get actual status.</p>
                     46: <p>The default is disable.</p>
                     47: 
                     48: <dt><b><code>e40</code></b><dd><p>Enables 40-bit MPPE encryption.</p>
                     49: <p>The default is disable.</p>
                     50: 
                     51: <dt><b><code>e56</code></b><dd><p>Enables 56-bit MPPE encryption.</p>
                     52: <p>The default is disable.</p>
                     53: 
                     54: <dt><b><code>e128</code></b><dd><p>Enables 128-bit MPPE encryption.</p>
                     55: <p>Note: in order for MPPE encryption to work, MS-CHAPv1 or MS-CHAPv2 auth
                     56: is mandatory, because the MPPE keys are generated using the authentication
                     57: results. If MS-CHAP auth is not used by link, encryption will not be negotiated.</p>
                     58: <p>The default is disable.</p>
                     59: 
                     60: <dt><b><code>stateless</code></b><dd><p>Enables stateless mode. This mode requires more CPU time and is somewhat
                     61: less secure, but allows faster recovery in the face of lost packets.</p>
                     62: <p>The default is disable.</p>
                     63: 
                     64: <dt><b><code>policy</code></b><dd><p>If enabled, Mpd uses the MPPE-Types and MPPE-Policy info from the authentication 
                     65: backend.</p>
                     66: <p>The default is disable.</p>
                     67: 
                     68: </dl>
                     69: </p>
                     70:  <HR NOSHADE>
1.1.1.2 ! misho      71: <A HREF="mpd.html"><EM>Mpd 5.7 User Manual</EM></A>
1.1       misho      72:  <b>:</b> <A HREF="mpd17.html"><EM>Configuring Mpd</EM></A>
                     73:  <b>:</b> <A HREF="mpd24.html"><EM>Compression (CCP) layer</EM></A>
                     74:  <b>:</b> <EM>MPPC protocol</EM><BR>
                     75: <b>Previous:</b> <A HREF="mpd24.html"><EM>Compression (CCP) layer</EM></A><BR>
                     76: <b>Next:</b> <A HREF="mpd26.html"><EM>IPCP layer</EM></A>
                     77: 
                     78: 
                     79: 
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