[UnderHost]

You can use the following commands to check various connections to the server.
Connections to port 80:

netstat -alntp | grep :80

Number of connections to port 80:

netstat -alntp | grep :80 | wc -l

List the remote IPs connecting to your server:

netstat -alntp | awk ‘{print $5}’ | cut -d: -f1 | sort

List the uniq remote IPs and the number of connections from each IP:

netstat -alntp | awk ‘{print $5}’ | cut -d: -f1 | sort | uniq -c | sort -n