When Web services are offered outside the firewall HTTP traffic should be blocked from internal networks through the use of some form of proxy access?

Firewall vs. Proxy server

A firewall and a proxy server are both parts of a network’s security. Firewalls can prevent unauthorized access to your computer by blocking ports and programs, whereas proxy servers effectively hide your internal network from the Internet.

Firewall

A firewall is a piece of software that helps to protect against unauthorized access to or from a secure network. 
Incoming and outgoing data packets are filtered through the firewall to see if they are allowed to enter or exit the network. This means the packet has been accepted if it contains the correct header information. 
Only authorized traffic should be allowed to pass through the firewall. It’s a system that sits in the middle of two networks, enforcing network access control policies. It uses encryption to encrypt data before it is sent over the network layer of the OSI model.

How Firewall Works?

The admins set specific access control policies or rules that govern what data packets are allowed. They are the people who have been granted access. This list may include port numbers, IP addresses, and internet protocols. This list is completely customizable by the system administrator to maintain complete control over what goes in and out of the network.

• Any incoming traffic can be monitored. A two-way firewall can also monitor and encrypt outgoing data.
• It keeps hackers out of your network.
• It lowers the risk of keylogging. Key loggers are programs that record your logins and then use that data to perform the same action later. Once they have your personal information, they can use it against you.

Proxy Server

It is a gateway or intermediary between any device on the internet and the rest of the internet. Connection requests are accepted and forwarded by a proxy, which then returns data in response to those requests. Client IP addresses are hidden by using an anonymous network id instead of the client’s actual one, making it impossible to determine the client’s real IP address.

How does a proxy server work?

A proxy server must receive a request from a user for that user to be able to access the server. Following that, it searches the cache for the same request. 
Requests that can be cached consume fewer connection speeds because they are delivered more quickly. Otherwise, the proxy obtains it from the internet and stores it for future use.

Proxy server utility

• It can be used to access services blocked in certain countries.
• All internet usage is recorded, as well as the websites they visit.
• By doing this, malware internet users cannot see a computer’s IP address.
• It’s used to restrict access to specific websites within a company.
• Requests are cached for faster network access.

The functions and purposes of a firewall vs a proxy server differ. By default, they protect a network’s local resources from unauthorized access and use.

Difference between Proxy Server and Firewall

Firewalls are commonly used to prevent unauthorized network access. Uninterruptible Power Supply (UPS) With a firewall, only authorized users can connect to a server on the organization’s network. A firewall may also restrict outbound connections. 
Firewalls protect against unauthorized connections. When configuring Interchange, consider firewalls. 
A proxy server on your network may also be required for outbound HTTP messages to the Internet. Your messages may need to pass through a proxy server on your partner’s network. 
Even though all proxy firewalls are also proxy servers, not all proxy servers are also proxy firewalls and vice versa. They both act as a go-between for servers and their respective customers. The ability to cache web pages to reduce network congestion is shared by the two programs, and both can keep information about the user hidden from the server. Using a proxy firewall, network traffic is subjected to a more thorough examination to detect and protect against potentially malicious traffic.

For outbound and incoming traffic.

Outbound – Your firewall must allow outbound HTTP traffic on the port specified in your partner’s URL (for example, 4080). Your partner’s firewall must allow inbound HTTP traffic on the specified port. 
You may want to restrict outgoing HTTP traffic on this port to only your partner’s IP address in highly secure environments. 
Your firewall needs to be updated if the IP address of your partner changes or if you add new partners. Those who choose to restrict traffic from specific IP addresses, such as your business partners, are doing the same thing you are. 
Inbound – Like outbound traffic, inbound traffic has firewall considerations. You can either allow all inbound traffic on a specific port, like 4080 or specify per-partner firewall rules based on each partner’s IP address. 
Defining partner-specific firewall inbound rules protects against denial-of-service attacks. However, as with partner-specific outbound firewall rules, changing IP addresses or adding partners imposes a firewall maintenance burden.

Read more about Firewall and Proxy Server

• Layer 7 Firewall
• WAF vs. Firewall
• What is a Web Application Firewall (WAF) ?
• Proxy server – Wikipedia
• Reverse proxy – Wikipedia
• Best proxy of 2021: free and paid services | TechRadar
• What is a next generation firewall

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