From 11965180ba6f278fea81f55a3aa48c8f7c667142 Mon Sep 17 00:00:00 2001 From: Mart Frauenlob Date: Wed, 10 Apr 2013 06:47:07 +0000 Subject: extensions: libxt_DNAT: rename IPv4 manpage and tell about IPv6 support This patch renames libipt_DNAT.man to libxt_DNAT.man thus informing about the IPv6 version, as suggested by Patrick McHardy. Also, it updates the list of valid protocols for port mapping is updated to: tcp, udp, dccp and sctp. Signed-off-by: Mart Frauenlob Signed-off-by: Pablo Neira Ayuso --- extensions/libxt_DNAT.man | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 extensions/libxt_DNAT.man (limited to 'extensions/libxt_DNAT.man') diff --git a/extensions/libxt_DNAT.man b/extensions/libxt_DNAT.man new file mode 100644 index 00000000..225274ff --- /dev/null +++ b/extensions/libxt_DNAT.man @@ -0,0 +1,38 @@ +This target is only valid in the +.B nat +table, in the +.B PREROUTING +and +.B OUTPUT +chains, and user-defined chains which are only called from those +chains. It specifies that the destination 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\-destination\fP [\fIipaddr\fP[\fB\-\fP\fIipaddr\fP]][\fB:\fP\fIport\fP[\fB\-\fP\fIport\fP]] +which can specify a single new destination 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 the destination port will never be +modified. If no IP address is specified then only the destination port +will be modified. +In Kernels up to 2.6.10 you can add several \-\-to\-destination options. For +those kernels, if you specify more than one destination address, either via an +address range or multiple \-\-to\-destination options, a simple round-robin (one +after another in cycle) load balancing 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 >= 2.6.22). +.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. +.TP +IPv6 support available since Linux kernels >= 3.7. -- cgit v1.2.3