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        !             5: <TITLE>MPPC protocol</TITLE>
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        !             8: 
        !             9: <A HREF="mpd.html"><EM>Mpd 5.6 User Manual</EM></A>
        !            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>
        !            71: <A HREF="mpd.html"><EM>Mpd 5.6 User Manual</EM></A>
        !            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: 
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