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diff --git a/trunk/extensions/libipt_SNAT.man b/trunk/extensions/libipt_SNAT.man
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+This target is only valid in the
+.B nat
+table, in the
+.B POSTROUTING
+chain.  It specifies that the source address of the packet should be
+modified (and all future packets in this connection will also be
+mangled), and rules should cease being examined.  It takes one type
+of option:
+.TP
+\fB--to-source\fP \fIipaddr\fP[\fB-\fP\fIipaddr\fP][\fB:\fP\fIport\fP[\fB-\fP\fIport\fP]]
+which can specify a single new source IP address, an inclusive range
+of IP addresses, and optionally, a port range (which is only valid if
+the rule also specifies
+.B "-p tcp"
+or
+.BR "-p udp" ).
+If no port range is specified, then source ports below 512 will be
+mapped to other ports below 512: those between 512 and 1023 inclusive
+will be mapped to ports below 1024, and other ports will be mapped to
+1024 or above. Where possible, no port alteration will
+
+In Kernels up to 2.6.10, you can add several --to-source options.  For those
+kernels, if you specify more than one source address, either via an address
+range or multiple --to-source options, a simple round-robin (one after another
+in cycle) takes place between these addresses.
+Later Kernels (>= 2.6.11-rc1) don't have the ability to NAT to multiple ranges
+anymore.
+.TP
+.BR "--random"
+If option
+.B "--random"
+is used then port mapping will be randomized (kernel >= 2.6.21).
+.RS
+.PP