From 48356408ccf03ec2fdba0ceae3d9b5eae5e5e959 Mon Sep 17 00:00:00 2001 From: Mart Frauenlob Date: Wed, 10 Apr 2013 06:45:08 +0000 Subject: extensions: libxt_MASQUERADE: rename IPv4 manpage and tell about IPv6 support also update list of protocols valid for port mapping. Signed-off-by: Mart Frauenlob Signed-off-by: Florian Westphal --- extensions/libxt_MASQUERADE.man | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 extensions/libxt_MASQUERADE.man (limited to 'extensions/libxt_MASQUERADE.man') diff --git a/extensions/libxt_MASQUERADE.man b/extensions/libxt_MASQUERADE.man new file mode 100644 index 00000000..c9e39501 --- /dev/null +++ b/extensions/libxt_MASQUERADE.man @@ -0,0 +1,28 @@ +This target is only valid in the +.B nat +table, in the +.B POSTROUTING +chain. It should only be used with dynamically assigned IP (dialup) +connections: if you have a static IP address, you should use the SNAT +target. Masquerading is equivalent to specifying a mapping to the IP +address of the interface the packet is going out, but also has the +effect that connections are +.I forgotten +when the interface goes down. This is the correct behavior when the +next dialup is unlikely to have the same interface address (and hence +any established connections are lost anyway). +.TP +\fB\-\-to\-ports\fP \fIport\fP[\fB\-\fP\fIport\fP] +This specifies a range of source ports to use, overriding the default +.B SNAT +source port-selection heuristics (see above). This is only valid +if the rule also specifies one of the following protocols: +\fBtcp\fP, \fBudp\fP, \fBdccp\fP or \fBsctp\fP. +.TP +\fB\-\-random\fP +Randomize source port mapping +If option +\fB\-\-random\fP +is used then port mapping will be randomized (kernel >= 2.6.21). +.TP +IPv6 support available since Linux kernels >= 3.7. -- cgit v1.2.3