MRV Communications LX-4000 Series Technické informace stáhnout pdf (Strana 551)

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D-20 iptables man Pages

LX Series Configuration Guide

exit code is 0 for correct functioning. Errors which

appear to be caused by invalid or abused command line

parameters cause an exit code of 2, and other errors cause

an exit code of 1.

BUGS

Check is not implemented (yet).

COMPATIBILITY WITH IPCHAINS

This iptables is very similar to ipchains by Rusty Rus

sell. The main difference is that the chains INPUT and

OUTPUT are only traversed for packets coming into the

local host and originating from the local host respec

tively. Hence every packet only passes through one of the

three chains; previously a forwarded packet would pass

through all three.

The other main difference is that -i refers to the input

interface; -o refers to the output interface, and both are

available for packets entering the FORWARD chain.

iptables is a pure packet filter when using the default

`filter' table, with optional extension modules. This

should simplify much of the previous confusion over the

combination of IP masquerading and packet filtering seen

previously. So the following options are handled differ

ently:

-j MASQ

-M -S

-M -L

There are several other changes in iptables.

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