LAN security devices

LAN Firewalls

First of all, LAN stands for "Local Area Network", which is a local computer network that covers a limited geographic area, such as an office or a school. A firewall, on the other hand, is a computer security device that is used to protect a computer network from unauthorized access from the outside.

In summary, a "LAN Firewall" is a computer security device that protects a local computer network, such as a corporate LAN or a school network, from external cyber attacks and potential security threats.

How does it work?

The firewall works by monitoring and controlling incoming and outgoing network traffic, allowing only authorized network traffic and blocking unauthorized traffic. This means that if a cyber attack or virus tries to penetrate the network, the firewall can block access to the network.

Types of firewalls

There are several types of firewalls available, including hardware and software firewalls. Hardware firewall is a physical device that is installed directly on the network, while software firewall is installed on a computer or server that manages the network.

What is it?

A proxy server is a server that acts as an intermediary between a client and another server, allowing the client to access remote server resources without directly connecting to it. There are different types of proxy servers, but the main two are HTTP proxy and SOCKS proxy.

HTTP PROXY

HTTP Proxy is mainly used for web traffic. When a client requests a web page, the request is sent to the proxy server, which in turn forwards the request to the remote web server. The web server then replies to the proxy server, which in turn sends the reply back to the client.

SOCKS PROXY

A SOCKS (Socket Secure) proxy is a type of proxy server that allows clients to access resources on the internet through it. Unlike other types of proxies, such as HTTP Proxies, a SOCKS proxy server does not interpret network traffic specifically for a particular protocol, but simply forwards it to and from the target client and server.

HOW WE USE PROXYS

Router ACL

A Router Access Control List (ACL) is a security mechanism used by routers to control access to network packets based on a set of rules defined by the network administrator.

In practice, an ACL allows or denies network traffic based on the source or destination IP address, the type of protocol used, port number, or other criteria defined by the network administrator.

Setting up a router ACL can be a complex process and requires a good understanding of computer networking and security technologies. However, once properly configured, a router ACL can be an effective security tool for protecting your network from external attacks as well as potential internal threats.

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