Find IP with Most Access from Apache Log
To find IP with most access from Apache or other web server log file, run
cat APACHE_ACCESS_LOG_FILE | awk -F' ' '{print $1}' | sort | uniq -c | sort -n
If you want to see IP that made most POST request
cat APACHE_ACCESS_LOG_FILE | grep POST | awk -F' ' '{print $1}' | sort | uniq -c | sort -n