Kerio Personal Firewall might conflict with certain application types which are based on identical or similar technologies as Kerio Personal Firewall. Kerio Technologies does not guarantee correct functioning of Kerio Personal Firewall nor your operating system if any of the following software applications are installed on the same operating system:
Personal firewalls (i.e. Internet Connection Firewall — a Windows XP component, Zone Alarm, Sygate Personal Firewall, Norton Personal Firewall, etc.) provide similar functions as Kerio Personal Firewall. Do not combine Kerio Personal Firewall with other firewalls.
Network firewalls (i.e. Kerio WinRoute Firewall, Kerio WinRoute Pro, Kerio WinRoute Lite, Microsoft ISA Server, CheckPoint Firewall-1, WinProxy by Ositis, Sygate Office Network, Sygate Home Network, etc.) also protects the computer on which it is installed, it is therefore not necessary to use a personal firewall on such computer.
Note: To create an elementary network firewall, Kerio Personal Firewall can be combined with a router, with a router which performs translation of IP addresses (NAT) or with a proxy server — i.e. Internet Connection Sharing (included in newer Windows operating systems). For detailed information refer to chapter 6.3. Preferences.