An ACL or Access control list is a common means by which access to and denial of services is controlled. On network devices such as Routers and firewalls, they act as filters for network traffic, packet storms, services and host access. Most of these devices come with standard or default ACL and allow for custom ACL’s.

The primary purpose of using ACL and a firewall is the same: to ensure that the traffic flow within and outside the system is regulated (Alsmadi, 2016). While the purpose of a firewall is to monitor the traffic in a network, ACL can have many other applications apart from monitoring access.

A firewall has one main use and purpose and that is to examine traffic passing through a part of the network and make decisions about what to let through and what to block. ACLs do stateless inspection, which means that the access list looks at a packet and has no knowledge of what has come before it.

2) What is the difference between ACL in Router and Firewall ASA? The biggest difference is that routers use wildcard masks, while ASAs use normal masks.

2 Answers. No, no and no. ACL’s block traffic from specific IP’s, subnets or ports/services (depending on whether you’re using standard or extended), but they perform no real firewall functions as you stated before. Security is best in layers, and ACL’s are meant to be one layer in a much larger security plan.

An IPS will inspect content of the request and be able to drop, alert, or potentially clean a malicious network request based on that content. A firewall will block traffic based on network information such as IP address, network port and network protocol. …

Most firewalls in consumer equipment don’t have their own IP address. The firewall is built into the router. The router has an IP address. All firewall settings are through the router.

The good news is that companies have two paths for moving forward with IPS protection: they can install both a standalone IPS and a firewall, or they can deploy an NGFW that can perform both functions. Even now, many NGFWs include IPS technology that is still essentially just a signature-matching engine.

An IPS is used to identify malicious activity, record detected threats, report detected threats and take preventative action to stop a threat from doing damage. An IPS tool can be used to continually monitor a network in real time.

The main difference is that an IDS only monitors traffic. If an attack is detected, the IDS reports the attack, but it is then up to the administrator to take action. That’s why having both an IDS and IPS system is critical.

An Intrusion Prevention System (IPS) is a network security/threat prevention technology that examines network traffic flows to detect and prevent vulnerability exploits.

A network intrusion detection system (NIDS) is crucial for network security because it enables you to detect and respond to malicious traffic. The primary benefit of an intrusion detection system is to ensure IT personnel is notified when an attack or network intrusion might be taking place.

The main difference being that firewall performs actions such as blocking and filtering of traffic while an IPS/IDS detects and alert a system administrator or prevent the attack as per configuration. A firewall allows traffic based on a set of rules configured.

An Intrusion Detection System (IDS) monitors and analyzes computer network traffic to protect a system from network-based threats. And IDS reads inbound and outbound packets, searching for suspicious patterns.

NIDS works in real-time, which means it tracks live data and flags issues as they happen. On the other hand, HIDS examines historical data to catch savvy hackers that use non-conventional methods that might be difficult to detect in real-time.

Its main function is to send an alert immediately when it identifies any activity in the system. It recognizes various security incidents. Also helps to examine the quantity and types of such suspicious attacks. It also detects bugs and issues relating to their network device configurations.