Kerio Control 9.4.2 is a solid Unified Threat Management (UTM) solution known for its ease of use and comprehensive feature set, though this specific version has some notable technical issues. Core Functionality
As a GFI KerioControl product, it integrates a next-generation firewall, intrusion prevention (IPS), content filtering, and a robust VPN client. It is highly regarded by users on platforms like G2 for its reliability and the ability to manage remote work effortlessly. Key Features
Ease of Management: Simple web-based administration and straightforward configuration of traffic and content rules.
Security Suite: Includes deep packet inspection, IPS to block known threats, and anti-virus filtering. kerio control 9.4.2
Bandwidth Management: Allows administrators to prioritize traffic for critical applications or limit non-essential downloads. Critical Known Issues in 9.4.2
While generally stable, users and official GFI Support have flagged specific bugs in the 9.4.2 release:
Vanishing Interfaces: A common issue where VMware virtual adapters may disappear or fail to load after the upgrade to 9.4.2. Kerio Control 9
Network Performance: Some users report significant speed drops (e.g., from 200 Mbps down to 100 Mbps) behind the firewall, even when QoS limits are disabled.
Security Vulnerabilities: This version has known vulnerabilities that were patched in later releases like 9.4.3. Summary Verdict
Kerio Control 9.4.2 remains a powerful tool for small to medium businesses, but due to the bugs mentioned above, it is highly recommended to upgrade to version 9.4.3 or higher. Later versions resolve many of the 9.4.2 performance lags and the critical "vanishing adapter" bug. Go to System Health > Backup & Restore
Are you currently running 9.4.2 on hardware or as a virtual appliance, and have you noticed any specific performance drops? Kerio Control 9.4.3 Release Notes
Backups: Always backup your configuration before making changes.
Upgrading: While version 9.4.2 is stable, security vulnerabilities are always a risk. GFI releases updates to patch flaws.
Kerio Control acts as a DNS forwarder for the LAN. It caches DNS requests to speed up browsing and allows you to create custom internal DNS records (Hosts) without needing a separate Windows DNS server.