Re: A very basic chain question

[Pascal Hambourg <pascal.mail@plouf.fr.eu.org>]

Hello,

J. Bakshi a écrit :
> 
> check limit ( say 10/min) --> check connlimit ( 2 per ip ) --> check
> hashlimit ( 2 attempt per min) ---> ACCEPT.
> 
> I have made a chain called sshrate but don't find the way to append the
> rules in that chain one by one. If I simply append the rules as accept
> then the very first rule is working bypassing the other two and my
> objective is to pass the rules in a pipe one by one and finally accept
> the valid packets. Could any one enlighten me in that direction ?

DROP (or REJECT) packets which fail early checks if possible :

-A sshrate -m <!check1> -j DROP
-A sshrate -m <!check2> -j DROP
-A sshrate -m <check3> -j ACCEPT

or put all checks in the same rule if possible :

-A sshrate -m <check1> -m <check2> -m <check3> -j ACCEPT

or cascade chains :

-A sshrate -m <check1> -j check1ok
-A check1ok -m <check2> -j check2ok
-A check2ok -m <check2> -j ACCEPT