Modified from https://code.google.com/p/wrtbwmon/.

• "First seen" and "Total" columns in usage table
• Monitoring of locally generated traffic on a per-interface basis
• remove function to delete iptables rules

wrtbwmon was designed to track bandwidth consumption on home routers. It accomplishes this with iptables rules, which means you don't need to run an extra process just to track bandwidth. wrtbwmon conveniently tracks bandwidth consumption on a per-IP address basis, so you can easily determine which user/device is the culprit.

• Install: make install
• Setup: wrtbwmon.sh setup
• Update table: wrtbwmon.sh update /tmp/usage.db (you can place the data table anywhere)
• Create html page: wrtbwmon.sh publish /tmp/usage.db /tmp/usage.htm

• Install the wrtbwmon.sh script somewhere, making sure to update baseDir and dataDir to point to readDB.awk and usage.htm*, respectively.

• Add the following to root's crontab, assuming <script location> is replaced with the actual location:

   * * * * * <script location> update /tmp/usage.db
   0 * * * * <script location> publish /tmp/usage.db /tmp/usage.htm
  

• wrtbwmon.sh remove