Best Firewall Software include:
Firewall Software TrustMap
TrustMaps are two-dimensional charts that compare products based on trScore and research frequency by prospective buyers. Products must have 10 or more ratings to appear on this TrustMap.
Firewall Software Overview
What are Firewall Software?
Firewalls are filters that stand between a computer or computer network and the Internet. Each firewall can be programmed to keep specific traffic in or out. All messages passing through the firewall are examined and those not meeting pre-defined security criteria are blocked.
For example, on the outbound side, firewalls can be configured to prevent employees from transmitting sensitive data outside the network, while on the inbound side, firewalls can be configured to prevent access to certain kinds of websites like social media sites.
Firewall Software Features & Capabilities
Application visibility and control
Identify and control evasive app threats
Intrusion Prevention integration
Physical and virtual environment support
Integration with LDAP and Active Directory
- "Sandbox," or isolated, cloud-based threat emulation
Firewalls use several methods to control traffic flowing in and out of a network:
Packet filtering: This method analyzes small pieces of data against a set of filters. Those that meet the filter criteria are allowed to pass through, while others are discarded.
Proxy service: In this method, computers make a connection to the proxy which then initiates a new network connection based on the content of the request. In this way, there is no direct connection or packet transfer on either side of the firewall. Network addresses are effectively hidden.
Stateful inspection: Stateful inspection is the new standard firewall security method that monitors communications packets over a period of time. Outgoing packets that request specific types of incoming packets are tracked. Only incoming packets that are an appropriate response are allowed to pass. Firewalls using this method are often referred to as next-generation firewalls (NGFW).
To compare different Firewall products, you likely want to consider evaluating these aspects of the software:
- Managed Service Provider vs. In-House Focus: Are you looking for a firewall product to sell to and manage for your clients, or do you need something for your own business? Products tailored to the former context will emphasize centralized management and customizability, while the latter will be more accessible for line of business users without IT security backgrounds.
- Physical vs. Cloud Deployments: The standard deployment method for firewalls is via hardware appliance deployed on premise. Alternative deployments on virtual machines, or hosted in the cloud on 3rd party infrastructure, have become frequent options among leading vendors. Cloud deployments frequently operate on a subscription pricing model, while physical appliances are more likely to be a one-time purchase, with additional costs for software updates varying by product.
- Multi-location vs. single location: Providing a firewall across multiple locations will require specific features. The most relevant feature differences will be VPN support (for securely connecting to remote offices), central management support, and native SD-WAN capabilities.
- Support: Reviewers frequently mention customer support and service, both positively and negatively depending on the product. Given a convergence of capabilities towards market parity, the extra support and services vendors provide can become a key differentiator between products.
The cost of firewalls can vary from free (for personal use) to significant sums of money for enterprise firewalls. Firewalls are often on-premise appliances, but can also be purchased as software which must be installed on a server, or as a cloud service. The range of pricing models is broad making it difficult to compare across vendors. However, an enterprise firewall may cost upwards of $30,000, depending on capability and type.
Frequently Asked Questions
There are four major types.
- Packet Filtering: Small pieces of data are analyzed against a set of filters and are either allowed to pass through or are discarded.
- Proxy Firewall: A proxy firewall serves as the gateway from one network to another. Computers make a connection to the proxy which then initiates a new network connection based on the content of the request.
- Stateful Inspection: Stateful inspection monitors the state of active connections and uses this information to determine which network packets to allow through. Decisions on what to allow through are based on a combination of defined rules and context.
- Next-Generation Firewall (NGFW): Next-generation firewalls go beyond packet filtering and stateful inspection. They have additional capabilities in order to help combat more modern threats like malware.