What are some common firewall rules that can help to protect a network?
There is no one answer to this question since it depends on the specific needs of the network in question. However, there are some general guidelines that can be followed in order to create firewall rules that will help to protect a network.
One of the most important things to keep in mind when creating firewall rules is to be as specific as possible. The more specific the rule, the less likely it is to allow unwanted traffic into the network. For example, a rule that allows all traffic from a specific IP address is more specific than a rule that allows all traffic from a specific country.
Another thing to keep in mind is that it is often better to block all traffic by default and then allow specific traffic through. This is because it is easier to identify specific traffic that should be allowed through than it is to identify all of the traffic that should be blocked.
Some other common firewall rules that can help to protect a network include:
– Only allowing traffic on specific ports
– Only allowing traffic from specific IP addresses
– Blocking traffic from specific IP addresses
– Blocking traffic from specific countries
What are the most common methods used to bypass a firewall?
A firewall is a network security system that controls incoming and outgoing network traffic based on predetermined security rules. A firewall typically establishes a barrier between a trusted internal network and untrusted external network, such as the Internet.
There are several types of firewall techniques that can be used to protect a network:
Packet filtering: Packet filtering is a firewall technique that inspects packet headers and allows or denies the packet based on the source and destination IP addresses, port numbers, and other criteria.
Application gateway: Application gateway firewall acts as a proxy server and applies security policies to incoming and outgoing traffic.
Circuit-level gateway: A circuit-level gateway inspects and verifies the three-way handshake of Transmission Control Protocol (TCP) connections.
Stateful inspection: Stateful inspection firewall keeps track of all connections passing through the firewall and applies security policies to each connection based on the connection’s state.
Security groups and network access control lists (ACLs): Security groups and network ACLs are used to control traffic at the network layer. Security groups are used in cloud environments, while network ACLs are used in on-premises environments.
Most common methods used to bypass a firewall are:
1. IP Spoofing
2. DNS cache poisoning
3. ARP spoofing
4. MAC flooding
5. Configuring the firewall to allow traffic from a specific port or IP address
Visit malwarezero.org to learn more about firewall. Disclaimer: We used this website as a reference for this blog post.