LanScan is a Layer 2 & Layer 3 network scanner which discovers network devices thanks to ARP, ICMP, DNS, mDNS and SMB packets.
Scanning local LAN
By default, LanScan scans your local LAN and scanned IPs are configured following your network configuration (IP address and network mask).
Your Mac IP address : 192.168.1.10 Your Mac Netmask : 255.255.255.0 or /24 Exampes of local scans: -> From 192.168.1.1 to 192.168.1.254 -> From 192.168.1.15 to 192.168.1.20
A local scan will allow you to:
Scanning external IP ranges
If you modify LanScan IP range to IPs which do not belong to your local LAN, LanScan will make an external scan with only ICMP packets (Layer 3 packets). ARP packets (Layer 2 packets) are not available as packets have to cross over a router to reach destinations IPs.
An external range can be done with private or public IPs,
Your Mac IP address : 192.168.1.10 Your Mac Netmask : 255.255.255.0 or /24 Examples of external ranges: -> From 192.168.0.1 to 192.168.0.254 -> From 10.10.50.10 to 10.10.50.20 -> From 126.96.36.199 to 188.8.131.52 -> From 184.108.40.206 to 220.127.116.11
An external scan have the following limitations: