Can anyone recommend a linux command line tool to monitor the number of bytes transferred between the local server and a specified IP address/port.
The equivalent tcpdump command would be:
tcpdump -s 0 -i any -w mycapture.trc port 80 host google.com
which outputs :
46 packets captured
131 packets received by filter
0 packets dropped by kernel
I'd like something similar that outputs:
54 bytes out, 176 bytes in
I'd like it to work on RHEL and be free/open-source. It would be good if there was an existing tool which I was just missing too!
Best Answer
You could use iptables. If you're not already using it, you can use an open Accept configuration, but have a rule in place to do the counting.
For example, on RHEL your
/etc/sysconfig/iptables
file could look something like:Where 10.10.1.1:80 is the host:port you want to count traffic to (you can't use a hostname). You can then check traffic counted with the command
iptables -nvxL
as root.Example output: