Mailing List Archive

Hello all,
I am trying to find what is and what for there is tha mangle table.
The only inforamtion which i found is only from manual.

mangle This table is used for specialized packet alteration. It has two built-
in chains: PREROUTING (for altering incoming packets before routing) and OUTPUT (for altering
locally-gen­
erated packets before routing).

and
TOS
This is used to set the 8-bit Type of Service field in the IP header. It is only valid in
the mangle table.

--set-tos tos
You can use a numeric TOS values, or use
iptables -j TOS -h
to see the list of valid TOS names.

And i can not figure out anything:(
For a example, when the manual say about altering the incoming packets what it tries to tell me?
I just want to know because i am building my firewall and i don't know if i have to leave the policy
as it is
or to set DROP policy and if i have to do add rules for this table.
This table has to do anything with security?
This is the question.


THanks in advance,
Pavlos


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
I love having the feeling of being in control
while i have the sensation of speed

The surfer of life
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