For the company's intranet, it is an independent network, isolated from the external network. The main purpose of a corporate intranet is to provide a secure and controlled environment for communication and resource sharing among employees within an organization. However, there are cases where access to the Internet may be required within the company.
If there is no fixed IP address on the company's intranet, you can establish a virtual channel to access the extranet. An encrypted channel established through a public network, such as the Internet, through which computers on the company's intranet can connect to an external network.
This is done by setting up a server within the company, and the company's employees connect to the server through the client. The server assigns a virtual IP address to each connected computer, which is dynamically obtained from a pool of public addresses. When computers on the company's intranet are connected to the server, they have the ability to access the extranet.
In order to realize the communication between the internal network and the external network, you can do it by port mapping and ** on the firewall. The firewall can be configured to allow traffic to pass through a specified port and send that traffic to a specified intranet machine. This allows computers on the company's intranet to initiate or accept connections from servers on external networks.
When building a company's intranet, you need to consider factors such as network topology, network equipment selection, and network security. Generally speaking, the construction of a company's intranet can be based on the size and needs of the company. The key is to ensure the stability and security of the internal network, which can be achieved through the use of network devices such as switches, routers, firewalls, etc.
For the company's extranet access, generally speaking, it can be achieved by obtaining a fixed public IP address. This can be obtained by entering into a service contract with a network service provider. With a fixed public IP address, users outside the company can access the company's extranet services, such as **, mail server, etc., by entering the IP address.