netstat -plan|grep :80|awk {‘print $5’}|cut -d: -f 1|sort|uniq -c|sort -nk 1

or

netstat -pan | sort +4 | grep TIME_WAIT | awk ‘{print $5}’ | sed -e s/’:.*’//g | sort | uniq -c | sort -k 1 -nr | head -n 20