Connections to 80/443 ports:
netstat -tn | egrep ':80|:443'
Sorted connections to 80/443 and only established:
netstat -tn | egrep ':80|:443' | grep ESTABLISHED | awk '{print $5}' | sed 's/:.*//' | sort | uniq -c | sort -n
Count of connections:
netstat -tn | egrep ':80|:443' | grep ESTABLISHED | wc -l
Then check WEB server logs