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how to connect proxy server with fortigate firewall, what is proxy server, proxy server types

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What is A proxy server ? 

A proxy server is an intermediary server that sits between a client device, such as a computer or mobile device, and a destination server on the Internet. When a client device sends a request to access a resource on the Internet, the request is first sent to the proxy server. The proxy server then evaluates the request, and either serves the request by retrieving the resource from the destination server on behalf of the client, or blocks the request if it violates any security policies.


Proxy servers are often used to improve security and performance in computer networks. By acting as a gateway between client devices and the Internet, they can filter and block malicious traffic, and cache frequently accessed content to reduce the amount of bandwidth used. They can also be used to bypass geographical restrictions on Internet content, by routing traffic through servers located in different countries.


There are different types of proxy servers, including web proxies, which are used specifically for web traffic, and SOCKS proxies, which can be used for any type of network traffic. Proxy servers can be configured to allow or deny access to specific websites or types of content, and to enforce policies such as bandwidth limits or time-of-day restrictions.



There are different types of proxy servers

There are different types of proxy servers based on their functionalities, including:


  1. HTTP Proxy: This type of proxy server is used for HTTP traffic and can be used to improve the performance of web servers by caching frequently accessed content.
  2. SOCKS Proxy: This type of proxy server operates at a lower level than an HTTP proxy, and can be used for any type of traffic.
  3. Transparent Proxy: This type of proxy server does not modify any traffic that passes through it and is often used for caching purposes.
  4. Anonymous Proxy: This type of proxy server hides the IP address of the client and makes it difficult to track their online activity.
  5. Reverse Proxy: This type of proxy server is typically used to load balance traffic across multiple servers or to provide an additional layer of security by hiding the IP address of the web servers from clients.


 To connect a proxy server with a FortiGate firewall


To connect a proxy server with a FortiGate firewall, you will need to configure the FortiGate firewall to allow traffic from the proxy server. Here are the general steps to follow:


     Configure the proxy server: Install and configure the proxy server on a server that is connected to the same network as the FortiGate firewall.


      Obtain the IP address of the proxy server: Take note of the IP address of the proxy server, as you will need this information when configuring the FortiGate firewall.


      Log in to the FortiGate firewall: Log in to the FortiGate firewall's administrative interface using a web browser.


      Configure firewall policies: Create a firewall policy that allows traffic from the proxy server. This can be done by going to Policy & Objects > IPv4 Policy, and creating a new policy with the following settings:


  • Source Interface: Select the interface that the proxy server is connected to.
  • Source Address: Set the source address to the IP address of the proxy server.
  • Destination Interface: Select the interface that the destination server is connected to.
  • Destination Address: Set the destination address to the IP address of the destination server.
  • Schedule: Set the schedule as required.
  • Services: Select the appropriate service for the type of traffic you want to allow.
  • Action: Set the action to "Allow."
  • Save the configuration: Save the configuration changes.

Once the firewall policy is created and saved, the FortiGate firewall should allow traffic from the proxy server to the destination server. You may also need to configure the proxy server to use the FortiGate firewall as its default gateway, depending on your network configuration.

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