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<H2><A NAME="rawip"></A> <A NAME="s14">14.</A> <A HREF="i4lfaq.html#toc14">rawip: Raw IP </A></H2>

<H2><A NAME="rawip_whatis"></A> <A NAME="ss14.1">14.1</A> <A HREF="i4lfaq.html#toc14.1">rawip_whatis: What is Raw IP, when should I use it? </A>
</H2>

<P>Raw IP does without the use of a protocol such as X.75 or HDLC
(for modem emulation, etc.) or PPP. TCP/IP packets are directly
exchanged.
Raw IP has both advantages and disadvantages.
Advantages:
<UL>
<LI> No handshaking (= faster connections)</LI>
<LI> Authorization by Caller ID (= fast, safe, no password)</LI>
<LI> Fixed IP address (= a broken connection can be continued by redialing)</LI>
<LI> Higher data transfer rates</LI>
<LI> Better stability (smaller driver = almost no bugs)</LI>
</UL>

Disadvantages:
<UL>
<LI> No handshaking
=&gt; Configuration must occur beforehand (IP addresses,...)
=&gt; sensible to use for only for one provider at a time</LI>
<LI> Authorization only by Caller ID
=&gt; Dialin only possible from one's own number</LI>
<LI> Fixed IP address
=&gt; must be known ahead of time, more IP addresses required, no dynamic
assignment of addresses possible.</LI>
</UL>

From this summary it should be clear under what conditions it makes sense
to use raw IP.</P>

<H2><A NAME="rawip_capi"></A> <A NAME="ss14.2">14.2</A> <A HREF="i4lfaq.html#toc14.2">rawip_capi: How can I use Raw IP with the new CAPI 2.0 interface (mISDN)? </A>
</H2>

<P>Raw IP can still be used with the new CAPI interface and drivers by using
<CODE>ItunD</CODE>, the ISDN tunnel Daemon. <CODE>ItunD</CODE> (ISDN tunnel Daemon)
provides a network tunnel over ISDN lines using the CAPI interface. The
ISDN4Linux isdn-net (raw IP) devices are supported.</P>
<P>You can find <CODE>ItunD</CODE> at:
<A HREF="http://sourceforge.net/projects/itund/">http://sourceforge.net/projects/itund/</A></P>


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