MRV Communications LX-4000 Series Technické informace stáhnout pdf (Strana 548)

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iptables man Pages D-17

querading 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 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). It takes one option:

--to-ports <port>[-<port>]

This specifies a range of source ports to use,

overriding the default SNAT source port-selection

heuristics (see above). This is only valid with if

the rule also specifies -p tcp or -p udp).

REDIRECT

This target is only valid in the nat table, in the PRE

ROUTING and OUTPUT chains, and user-defined chains which

are only called from those chains. It alters the destina

tion IP address to send the packet to the machine itself

(locally-generated packets are mapped to the 127.0.0.1

address). It takes one option:

--to-ports <port>[-<port>]

This specifies a destination port or range or ports

to use: without this, the destination port is never

altered. This is only valid with if the rule also

specifies -p tcp or -p udp).

EXTRA EXTENSIONS

The following extensions are not included by default in

the standard distribution.

ttl

This module matches the time to live field in the IP

header.

--ttl ttl

Matches the given TTL value.

TTL

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