diff options
author | Mart Frauenlob <mart.frauenlob@chello.at> | 2013-04-10 06:49:57 +0000 |
---|---|---|
committer | Pablo Neira Ayuso <pablo@soleta.eu> | 2013-05-29 19:27:36 +0200 |
commit | 8df3c38438bb75edb480845913af77692c8a5c99 (patch) | |
tree | 44094eedf0cd785b28ffbdcb82f37b0abe87c468 /extensions/libxt_SNAT.man | |
parent | b8646dc9623631db3b71a5c1846566cf54a66a3a (diff) |
extensions: libxt_SNAT: rename IPv4 manpage and tell about IPv6 support
This patch renames libipt_SNAT.man to libxt_SNAT.man thus informing
about the IPv6 version.
Also the list of valid protocols for port mapping is updated to:
tcp, udp, dccp and sctp.
Signed-off-by: Mart Frauenlob <mart.frauenlob@chello.at>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'extensions/libxt_SNAT.man')
-rw-r--r-- | extensions/libxt_SNAT.man | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/extensions/libxt_SNAT.man b/extensions/libxt_SNAT.man new file mode 100644 index 00000000..f0620a21 --- /dev/null +++ b/extensions/libxt_SNAT.man @@ -0,0 +1,45 @@ +This target is only valid in the +.B nat +table, in the +.B POSTROUTING +and +.B INPUT +chains, and user-defined chains which are only called from those +chains. 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 the +following options: +.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. Optionally a port range, +if the rule also specifies one of the following protocols: +\fBtcp\fP, \fBudp\fP, \fBdccp\fP or \fBsctp\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 occur. +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. +.PP +Kernels prior to 2.6.36-rc1 don't have the ability to +.B SNAT +in the +.B INPUT +chain. +.TP +IPv6 support available since Linux kernels >= 3.7. |