Failing to make bandwidth-pgsql to work, I decided just to log individual host' bandwidth consumption within the IPTABLES
I got Shorewall up and running with simple configuration allowing everything to come-and-go
I put my own script on /etc/shorewall/start
iptables -N localnet
iptables -A FORWARD -d 10.1.1.0/8 -j localnet
iptables -A FORWARD -s 10.1.1.0/8 -j localnet
iptables -A localnet -d 10.1.1.5
iptables -A localnet -s 10.1.1.5
iptables -A localnet -d 10.1.1.10
iptables -A localnet -s 10.1.1.10
As I am hopping with running command :
iptables -L -v -n
will gives me the list of readable traffic for host 10.1.1.5 and 10.1.1.10
but after waiting for few minutes/hours, this is what I got: