7 min readPing scans are used for detecting live hosts in networks. Nmap’s default ping scan (-sP) sends TCP SYN, TCP ACK, and ICMP packets to determine if a host is responding, but if a firewall is blocking these requests, it will be treated as offline. Fortunately, Nmap supports a scanning technique named the TCP … Continue reading Discovering network hosts with ‘TCP SYN’ and ‘TCP ACK’ ping scans in Nmap[Tutorial]