Blame extensions/libxt_NETMAP.man

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This target allows you to statically map a whole network of addresses onto
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another network of addresses.  It can only be used from rules in the
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.B nat
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table.
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.TP
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\fB\-\-to\fP \fIaddress\fP[\fB/\fP\fImask\fP]
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Network address to map to.  The resulting address will be constructed in the
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following way: All 'one' bits in the mask are filled in from the new `address'.
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All bits that are zero in the mask are filled in from the original address.
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.TP
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IPv6 support available since Linux kernels >= 3.7.