super answer! tx! 1) Should I change the 10.168.0.2/32 to 0.0.0.0/0 ? Would that catch everything on eth0 ? My internal lan is 192.168.0.0/24. But mail is delivered directly to the fw which wont pass to the internal network but is also part of the internet traffic. So I guess I have to types of internet traffic. 192.168.0.0/24 which is the internal network doing the usual stuff on the internet like browsing etc. and mail which is going to/from 10.168.0.2 which is the external ethernet of the firewall. 2) iptables-save -c ACCT Unknown arguments found on commandline I guess I'm doing something stupid here. What would the right syntax be ? e. On Tuesday 06 July 2004 10:45, Antony Stone wrote: > On Tuesday 06 July 2004 9:17 am, Etienne Ledoux wrote: > > Greetings, > > > > 1) I have a firewall and would like to count all the traffic > > entering/leaving the external interface (I want to count only internet > > traffic, which is the traffic entering/leaving the external if). Is this > > rule right ? > > > > iptables -N ACCT > > iptables -I FORWARD -j ACCT > > iptables -I INPUT -j ACCT > > iptables -I OUTPUT -j ACCT > > iptables -A ACCT -s 10.168.0.2/32 -d 0.0.0.0/0 -o eth0 > > iptables -A ACCT -s 0.0.0.0/0 -d 10.168.0.2/32 -i eth0 > > > > 10.168.0.2 is my external interface ip and is also the ip which my > > internal network is natted behind. > > You want to count traffic addressed *to this machine* from the Internet, > and traffic addressed *from this machine* to the Internet, yes? In that > case these rules will work, but there is no point in jumping to the ACCT > chain from the FORWARD chain. > > Remember that FORWARD is *only* for traffic going through the machine, and > INPUT and OUTPUT are *only* for traffic to/from the machine (ie: *never* > for traffic going through it). > > If you want to count traffic addressed *to any machine on your internal > network* from the Internet, and traffic addressed *from any machine on your > network* to the Internet, then you should use your subnet address in the -s > and -d options, not the address of your firewall. > > At a guess this subnet is going to be 10.168.0.0/24, but I don't know what > netmask you're using. > > > 2) I would like to save/restore only this accounting rule. I thought > > 'iptables-save -c -t ACCT' would work but it doesn't. > > No, ACCT is not a table (like filter, nat and mangle are) - it is a chain > (like FORWARD, INPUT and OUTPUT are). Don't use -t > > > 3) How do I flush the accounting stats. > > iptables -Z ACCT, or iptables -L -Z ACCT -nvx if you want to see the > counters immediately before zeroing them. > > Regards, > > Antony.
