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howto-html-en-20080722-2mdv2010.1.noarch.rpm

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>Chapter 5. GRE and other tunnels</H1
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>Table of Contents</B
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>5.1. <A
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>A few general remarks about tunnels:</A
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>5.2. <A
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>IP in IP tunneling</A
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>5.3. <A
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>GRE tunneling</A
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>5.3.1. <A
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>IPv4 Tunneling</A
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>IPv6 Tunneling</A
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>There are 3 kinds of tunnels in Linux. There's IP in IP tunneling, GRE tunneling and tunnels that live outside the kernel (like, for example PPTP). </P
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