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Computer Network Security

Nessus Network Vulnerability Scanner
Nessus is a network vulnerability scanning program that scans network hosts for vulnerabilities and generates reports on its findings. More ...

ARP, MAC, Poisoning, and WiFi Security
In this article we cover the basics on Address Resolution Protocol (ARP), Media Access Control Addresses (MAC), Wireless (WiFi), and layer 2 communications. I explain how a 'Man in the Middle Attack' works. The common name for this is ARP poisoning, MAC poisoning, or Spoofing. More ...

Difference Between Rule and Role Based Access Control
Access control is the method used to block or allow access to a network or network resources. Two types of access control are rule-based and role-based. The difference between rule-based and role-based access control is explained here. More ...

Types of Computer Security Threats
No book nor any checklist or method can show you all the kinds of harm that can happen to computer assets. There are too many ways to interfere with your use of these assets. Two information sources are of value however. The CVE list and the CVSS measurement system. More ...

Network Security
Network security starts with physical security. Network components such as servers, hubs, and routers should be located in a secure equipment room. Part of physical security is protecting your cable plant from damage and electronic eavesdropping. More ...

Handling Rogue Access Points
A Rogue access point is any wireless access points that exist on your network without the consent of the business. If an insider were to use a laptop to act as an access point, regardless of the intent, it poses a security risk. More ...

Wireless Network Security
Before the IEEE completed the 802.11i standard the Wi-Fi Alliance released WPA. After the release of the IEEE 802.11i standard, the Wi-Fi Alliance released WPA2 which is compatible with both the 802.11i standard and WPA. More ...

How a Firewall Provides Network Security
A firewall provides security by controlling access between a network and an untrusted network. A firewall can be a hardware device, software, or combination of hardware and software. More ...

Are You Meeting ISO 27000 Standards for Information Security Management?
The ISO 27000 standard developed by The (IEC) and (ISO) is an internationally accepted industry standard for Information Security Management (ISM). More ...

Types of DoS (Denial of Service) Attacks
The methods used to launch a DoS (Denial of Service) attack can be divided into three essential categories: Flood attacks, Logic attacks, and Distributed Denial-of-Service (DDoS) attacks. Attackers may use each method to compromise or completely shut down an Internet server. More ...

Intrusion Detection System (IDS) and Intrusion Prevention System (IPS)
"Most organizations use both IDS and an IPS. The IPS automatically blocks attacks where it is accurate, while the IDS logs and notifies network administrators of suspicious activity so they can use their judgment as to what countermeasures to take. More ...

Secure, Network Compliant BYOD (Bring Your Own Device) Solutions
A recent IBM study and revealed that 81% of organizations reported their employees are using their personal mobile devices to connect to "company resources". But BYOD (Bring Your Own Device) doesn't necessarily equate to network security problems. More ...

Difference Between Network Firewall and Web Application Firewall
A Network Firewall acts as a security barrier between a trusted network, such as the local network (LAN), and an untrusted network, such as the Internet. A >Web Application Firewall (WAF) monitors and allows or blocks data packets as they travel to and from a Web application. More ...