Friend or Foe: Is your Firewall Keeping Viruses or Clients out of Your System?

With thousands of viruses flooding the internet and hackers capable of stealing all your files, having a reliable firewall is required for any business. A firewall is basically a type of software that screens out potential threats that attempt to reach your computer. It has the power to grant safe sites access, and deny those that are suspicious. Though your firewall may be one of your computer’s best security features, it does have a couple flaws, and one of these flaws include denying your customer’s IP address access to your website.

Firewall Systems

When it comes to business communication, everything must be smooth, clear, and precise. There are a lot of systems that can be professionally installed that do this, and yes, that includes the firewall. Like what was said earlier, the firewall creates a clean connection between two networks. But if your firewall is hindering you from communicating with another party, you can lose a potential client and their trust. Luckily, there are five types of basic firewalls that inspect and filter IP addresses differently, and these are:

1. Circuit-Level Gateway

A circuit-level gateway monitors Transmission Control Protocol (TCP) handshaking between packets to determine whether a requested session is legitimate or not. The only time a circuit-level gateway trusts a client is when the client’s basic filtering criteria meets the firewall’s rules and policies.

2. Packet-Filtering Firewalls

Packet-filtering firewalls control the access to a network by analyzing packets that are coming in and out. By reading the source and destination of the IP address, this firewall can grant or deny access to the user.

3. Application-Level Gateways (Proxies)

This type of firewall prevents any direct contact between a trusted server or client and an untrusted host. It uses a proxy server which allows clients to make an indirect network connection to other network services. Sometimes, the proxy alters the client’s request or the server’s response for various functions. This type of system provides clients a high-level secure network system communication.

4. Stateful Inspection Firewalls

A stateful inspection firewall is a security feature that is included in business networks. It has the ability to examine each packet, as well as keep track on whether or not the packet is part of an established TCP session. The stateful inspection firewall monitors the state of the active connections, and then determines which network packets are allowed through the firewall by utilizing the information gained.  It also examines packets that are both incoming and outgoing over time. The stateful inspection firewall offers more security, but exacts a great toll on your network’s performance.

5. Multilayer Inspection Firewalls

The multilayer inspection firewall relies on algorithms that recognize which service is being requested. It does not need to provide a proxy for each protected server. The characteristics of this firewall is a combination of packet filtering and circuit monitoring, and yet is still able to create a direct connection between the local and remote host. One of the great things about the multilayer inspection firewall is that it gives users maximum control over which packets go where, and it does this by retaining the status assigned to a packet by each firewall component which is then passed on the way up the protocol stack.

Allowing your customers access to your network can give your business a slight advantage. But trying to spot illegitimate clients can be quite complicated. If you are having trouble finding or setting up the perfect firewall for your business, contact Leblanc Communications. We can help you assemble, as well as maintain and support all your telecommunication devices. Give us a call at 203-938-8400. We service properties that are located in Connecticut and New York.