A firewall network is a network security device that allows or denies network access to traffic flows between unreliable zones (like the Internet) and trusted zones like private or corporate networks.
A firewall network acts as the “traffic police” or demarcation point in the network. All communication flow through firewall network and therefore it is its role to decide on whether to grant or reject network access to traffic that flows between an untrustworthy zone and a trusted zone for instance corporate or a private networks. Firewall network implements access controls via a positive control model that insists that only traffic defined in the firewall is accessed.
A great challenge is to identify security risks systematically and proactively in a large network. The best forward solution to curb the issue is to ensure that the network firewall, which is the first line of defence, is configured optimally for high performance, security, and continuous compliance.
Nowadays it is important to focus on users, applications, content and not just ports and protocols to deliver control and visibility, Palo Alto Networks’ next-generation firewalls facilitate safe use of modern applications, without dealing with the unnecessary risks that accompany them.
Examples of Network Firewalls
Packet Filtering Firewall
This type of network firewall has a list of firewall security rules and regulations which can block traffic based on IP protocol, IP address and/or port number. Under this network firewall management program, all web traffic will be granted, including web-based attacks. In this instance, one ought to have intrusion prevention, in addition to firewall security, in order to differentiate between good web traffic (simple web requests from people browsing your website) and bad web traffic (people attacking your website).
Stateful Network Firewall
This is one has some similarities to a packet filtering firewall, but it is more intelligent about keeping track of active connections, so you can define firewall management rules such as “only allow packets into the network that are part of an already established outbound connection.”
Application-Aware Network Firewall
Just like in deep packet inspection, save for the fact that the firewall understands certain protocols and can parse them, so that signatures or rules can specifically address certain fields in the protocol. The flexibility of this approach to computer firewall protection is great and permits the signatures or rules to be both specific and comprehensive.
Application Proxy Network Firewall
An application proxy acts as an intermediary for certain application traffic such as HTTP, or web, traffic- intercepting all requests and validating them before passing them along. In addition, an application proxy firewall takes after certain kinds of intrusion prevention. The implementation of a full application proxy is nonetheless quite difficult and each proxy can only handle one protocol for example web or incoming email.
- APPLICATION LAYER FIREWALL FOR DYNAMIC DATA
- Application Firewall
- Firewall Policies For Dynamic Data Masking