Monitor your network with iptraf - gHacks Tech News
Need a LAN Network Traffic Monitor web-tool - Super User
How to: Monitor real-time IP/network/Internet/LAN traffic, interface statistics etc. in Linux/Debian/Ubuntu/Kali Linux/CentOS/Fedora/RedHat etc. < Blog-D without Nonsense
Monitor network traffic and limit data usage with NetBalancer for Windows – 4sysops