Re: related to -z option

[Daniel Chemko <dchemko@smgtec.com>]

If you have an accouting tool which doesn't handle accumulative 
statistics gathering, you will have to zero the counters right after the 
probe. Not ideal, but a hack to make some acocunting packages work.

Eg:
I probe an ipables rule ever 5 min.


Minute 0
    iptables -Z
    iptables -nvxL | grep ... | awk '{print $2}'
    5345
    iptables -Z
Minute 5
    iptables -nvxL | grep ... | awk '{print $2}'
    5454
    iptables -Z
Accounting with a non-acumulative counter == 5345,5454
Accounting with an acumulative counter == 5345,109 (wrong)


Minute 0
    iptables -Z
    iptables -nvxL | grep ... | awk '{print $2}'
    5345
Minute 5
    iptables -nvxL | grep ... | awk '{print $2}'
    10799
Accounting with a non-acumulative counter == 5345,10799 (wrong)
Accounting with an acumulative counter == 5345,5454


rohit persaie wrote:

> Dear All,
>
> There is one option in iptables .....-Z , used for  the  packet  and 
> byte counters in all the chains.
>
> Please tell me the use of this option, with example.
>
> with regards ,
>
> persaie
>
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