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diff --git a/trunk/extensions/libxt_string.man b/trunk/extensions/libxt_string.man
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+This modules matches a given string by using some pattern matching strategy. It requires a linux kernel >= 2.6.14.
+.TP
+\fB--algo\fP {\fBbm\fP|\fBkmp\fP}
+Select the pattern matching strategy. (bm = Boyer-Moore, kmp = Knuth-Pratt-Morris)
+.TP
+.BI "--from " "offset"
+Set the offset from which it starts looking for any matching. If not passed, default is 0.
+.TP
+.BI "--to " "offset"
+Set the offset from which it starts looking for any matching. If not passed, default is the packet size.
+.TP
+[\fB!\fP] \fB--string\fP \fIpattern\fP
+Matches the given pattern.
+.TP
+[\fB!\fP] \fB--hex-string\fP \fIpattern\fP
+Matches the given pattern in hex notation.