NETwork troubleshooting

NETwork stuff

sudo ifconfig eth0 192.168.1.50 netmask 255.255.255.0 up
sudo ifconfig eth0 hw 00:00:00:00:00:00
sudo route add default gw 172.16.236.0

Display current active Internet connections:
    netstat -nat

Display open ports
    sudo netstat -tulp || sudo netstat -tulpn

Display network interfaces stats
    netstat -i

Display established connections
    netstat -tue
Where,
    -t : TCP connections
    -u : UDP connections
    -e : Established

TCPSTAT
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http://www.percona.com/docs/wiki/tcprstat:start