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doc: properly escape non-hyphens
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@@ -6,19 +6,19 @@ out, but this information can be used in conjunction with other rules to block
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the remote host's future connections. So this match module will match on the
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(probably) last packet the remote side will send to your machine.
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.TP
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\fB--stealth\fR
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\fB\-\-stealth\fR
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Match if the packet did not belong to any known TCP connection
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(Stealth/FIN/XMAS/NULL scan).
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.TP
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\fB--synscan\fR
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\fB\-\-synscan\fR
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Match if the connection was a TCP half-open discovery (SYN scan), i.e. the
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connection was torn down after the 2nd packet in the 3-way handshake.
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.TP
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\fB--cnscan\fR
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\fB\-\-cnscan\fR
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Match if the connection was a TCP full open discovery (connect scan), i.e. the
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connection was torn down after completion of the 3-way handshake.
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.TP
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\fB--grscan\fR
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\fB\-\-grscan\fR
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Match if data in the connection only flew in the direction of the remote side,
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e.g. if the connection was terminated after a locally running daemon sent its
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identification. (E.g. openssh, smtp, ftpd.) This may falsely trigger on
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