sudo lsof -i -P -n | grep LISTEN netstat -tulnp | grep LISTEN
Show iptables nat with packet counters:
iptables -L -t nat -nvx
tcpdump -n -nn -v -i eth0 host 192.168.0.1
conntrack-tools (apt-get install conntrack):
conntrack -L [-j 192.168.0.1]
apache2ctl fullstatus
apache2 -V
python -m SimpleHTTPServer python -m http.server 8000