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Diffstat (limited to 'extensions/libipt_SNAT.man')
| -rw-r--r-- | extensions/libipt_SNAT.man | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/extensions/libipt_SNAT.man b/extensions/libipt_SNAT.man new file mode 100644 index 0000000..6b828fd --- /dev/null +++ b/extensions/libipt_SNAT.man @@ -0,0 +1,37 @@ +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 +\fB\-p tcp\fP +or +\fB\-p udp\fP). +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 +\fB\-\-random\fP +If option +\fB\-\-random\fP +is used then port mapping will be randomized (kernel >= 2.6.21). +.TP +\fB\-\-persistent\fP +Gives a client the same source-/destination-address for each connection. +This supersedes the SAME target. Support for persistent mappings is available +from 2.6.29-rc2. |