Diffstat (limited to 'extensions/libipt_SNAT.man')
1 files changed, 5 insertions, 2 deletions
diff --git a/extensions/libipt_SNAT.man b/extensions/libipt_SNAT.man
index 2d9427f1..daef78f1 100644
@@ -7,7 +7,7 @@ modified (and all future packets in this connection will also be
mangled), and rules should cease being examined. It takes one type
-.BR "--to-source " "\fIipaddr\fP[-\fIipaddr\fP][:\fIport\fP-\fIport\fP]"
+.BR "--to-source " "\fIipaddr\fP[-\fIipaddr\fP][:\fIport\fP-\fIport\fP]" [ "--random" ]
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
@@ -17,7 +17,10 @@ or
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 occur.
+1024 or above. Where possible, no port alteration will If option
+is used then port mapping will be forcely randomized to avoid
+attacks based on port prediction (kernel >= 2.6.21).
In Kernels up to 2.6.10, you can add several --to-source options. For those