A comprehensive security product that includes protection against multiple threats. A UTM product typically includes a firewall, antivirus software, content filtering and a spam filter in a single integrated package.

The advantages of UTM are simplicity, streamlined installation and use, and the ability to update all the security functions or programs concurrently. As the nature and diversity of Internet threats evolves and grows more complex, UTM products can be tailored to keep up with them all. This eliminates the need for systems administrators to maintain multiple security programs over time. 

( Source from www.searchsecurity.com)

Network security consists of the necessities made in an underlying computer network infrastructure, policies to protect the network and the network-accessible resources from unauthorized access and the effectiveness (or lack) of these measures combined together.

Firewall
A firewall is a set of related programs, located at a network gateway server that protects the resources of a private network from users from other networks. An enterprise with an intranet that allows its workers access to the wider Internet installs a firewall to prevent outsiders from accessing its own private data resources and for controlling what outside resources its own users have access to. For mobile users, firewalls allow remote access in to the private network by the use of secure logon procedures and authentication certificates.

FortiNet
In order to solve the security problems for businesses and service providers, the Unified Threat Management (UTM) market has emerged. UTM devices incorporate firewall, intrusion prevention and gateway antivirus, at a minimum. In order to address these challenges, an effective UTM solution has delivered a network security platform comprised of robust and fully integrated security and networking functions. Protection is provided against next generation application layer threats and offer centralized management from a single console, all without impairing the performance of the network.

FortiGate Unified Threat Management

Microsoft ISA Server 2006
ISA Server 2006 is an integrated edge security gateway that helps protect IT environments from Internet-based threats while providing users fast and secure remote access to applications and data. By pre-authenticating users before they gain access to any published servers, inspecting even encrypted traffic at the application layer in a stateful manner, and providing automated publishing tools, ISA Server 2006 makes it easier to provide security for corporate applications accessed over the Internet.

Besides, organizations can use ISA Server 2006 to connect to and secure their branch offices, while efficiently utilizing network bandwidth. By providing HTTP compression, caching of content (including software updates) and site-to-site virtual private network (VPN) capabilities integrated with application-layer filtering, ISA Server 2006 makes it easier to securely expand corporate networks. ISA Server 2006 is built with a hybrid proxy-firewall architecture, deep content inspection, granular policies, and comprehensive alerting and monitoring capabilities, which all of it makes it easier to manage and protect your network. 

Microsoft Forefront
The Microsoft Forefront family of business security products helps provide greater protection and control over the security of your network infrastructure. Microsoft Forefront’s products easily integrate with each other, with your organization’s IT infrastructure, and can be supplemented through interoperable third-party solutions, enabling end-to-end, defense-in-depth security solutions. Simplified management, reporting, analysis, and deployment enable you to more efficiently protect your organization’s information resources and secure access to applications and servers. With highly responsive protection supported by Microsoft technical guidance, Microsoft Forefront helps you confidently meet ever-changing threats and increased business demands. 

Microsoft’s security products are tied together through a powerful identity management infrastructure that provides fine levels of granularity and control. This control is further enabled by a broad set of management and reporting capabilities that offer robust event collection, analysis, and reporting, as well as the tools to create and enforce security best practices. Finally, Microsoft offers a wide array of technical and industry-specific guidance to help businesses configure their security products correctly and effectively.