diff options
Diffstat (limited to 'extensions/libipt_SNAT.man')
-rw-r--r-- | extensions/libipt_SNAT.man | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/extensions/libipt_SNAT.man b/extensions/libipt_SNAT.man index 2d9427f1..daef78f1 100644 --- a/extensions/libipt_SNAT.man +++ b/extensions/libipt_SNAT.man @@ -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 of option: .TP -.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 +.B "--random" +is used then port mapping will be forcely randomized to avoid +attacks based on port prediction (kernel >= 2.6.21). .RS .PP In Kernels up to 2.6.10, you can add several --to-source options. For those |