A port scanner is a must have tool for the network administrator. It allows you to scan your network for active ports. This way you can identify applications such as web servers, ftp servers etc. running on your servers and workstations. Any unused applications should be stopped. Furthermore, you can scan your network for ports that might be used by Trojans.The LANguard port Scanner can be used to:· Scan newly installed systems for active services that are not needed or not configured properly.· Scan for newly added ports that might indicate Trojan activity· Check proxy firewall ports· Test router access lists· Perform basic security checks· Look for reverse telnet ports· Verify available network servicesThe LANguard port scanner is freeware.