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Network Security

Posted on November 26, 2018January 9, 2019Posted in IT SECURITY

 What Is Network Security?

   Network security is any activity designed to protect the usability and integrity of your network and data. It includes both hardware and software technologies. Effective network security manages access to the network. It targets a  variety of threats and stops them from entering or spreading on your network.


How does network security work?

Network security combines multiple layers of defenses at the edge and in the network. Each network security  layer  implements policies and controls. Authorized users gain access to network resources, but malicious actors  are blocked from carrying out exploits and threats.

How do I benefit from network security?

Digitization has transformed our world. How we live, work, play, and learn have all changed. Every organization that wants to deliver the services that customers and employees demand must protect its network. Network  security also helps you protect proprietary information from attack. Ultimately it protects your reputation.

 Types of network security

 Access control

 Not every user should have access to your network. To keep out potential attackers, you need to recognize each  user and each device. Then you can enforce your security policies. You can block noncompliant endpoint devices  or give them only limited access. This process is network access control (NAC).

Cisco Identity Services Engine

Antivirus and antimalware software

 “Malware,” short for “malicious software,” includes viruses, worms, Trojans, ransomware, and spyware. Sometimes malware will infect a network but lie dormant for days or even weeks. The best antimalware  programs not only scan for malware upon entry, but also continuously track files afterward to find anomalies, remove malware, and fix damage.

Advanced Malware Protection

Application security

Any software you use to run your business needs to be protected, whether your IT staff builds it or whether you  buy it. Unfortunately, any application may contain holes, or vulnerabilities, that attackers can use to infiltrate your  network. Application security encompasses the hardware, software, and processes you use to close those holes.

Services for Security

Behavioral analytics

  To detect abnormal network behavior, you must know what normal behavior looks like. Behavioral analytics tools  automatically discern activities that deviate from the norm. Your security team can then better identify indicators of compromise that pose a potential problem and quickly remediate threats.

Cognitive Threat Analytics | Stealthwatch | Network as a Sensor

   Data loss prevention

   Organizations must make sure that their staff does not send sensitive information outside the network. Data loss prevention, or DLP, technologies can stop people from uploading, forwarding, or even printing critical information in    an unsafe manner.

Data Loss Prevention

Email security

Email gateways are the number one threat vector for a security breach. Attackers use personal information and social engineering tactics to build sophisticated phishing campaigns to deceive recipients and send them to sites serving up malware. An email security application blocks incoming attacks and controls outbound messages to         prevent the loss of sensitive data.

Email Security Appliance | Cloud Email Security


Firewalls put up a barrier between your trusted internal network and untrusted outside networks, such as the Internet. They use a set of defined rules to allow or block traffic. A firewall can be hardware, software, or both. Cisco offers unified threat management (UTM) devices and threat-focused next-generation firewalls.

More about firewalls

Intrusion prevention systems

An intrusion prevention system (IPS) scans network traffic to actively block attacks. Cisco Next-Generation IPS(NGIPS) appliances do this by correlating huge amounts of global threat intelligence to not only block malicious    activity but also track the progression of suspect files and malware across the network to prevent the      spread of outbreaks and reinfection.

Learn the fundamentals of IPS (5:48 min)

Mobile device security

Cybercriminals are increasingly targeting mobile devices and apps. Within the next 3 years, 90 percent of IT  organizations may support corporate applications on personal mobile devices. Of course, you need to control  which devices can access your network. You will also need to configure their connections to keep network traffic private.Mobile Device Management

Network segmentation

Software-defined segmentation puts network traffic into different classifications and makes enforcing security policies easier. Ideally, the classifications are based on endpoint identity, not mere IP addresses. You can assign access rights based on role, location, and more so that the right level of access is given to the right people and suspicious devices are contained and remediated.

Cisco TrustSec | Network as an Enforcer

Security information and event management

SIEM products pull together the information that your security staff needs to identify and respond to threats. These products come in various forms, including physical and virtual appliances and server software.

Identity Services Engine with SIEM (PDF – 439 KB)


A virtual private network encrypts the connection from an endpoint to a network, often over the Internet. Typically, a remote-access VPN uses IPsec or Secure Sockets Layer to authenticate the communication between device and network.

VPN and Endpoint Security Clients

Web security

A web security solution will control your staff’s web use, block web-based threats, and deny access to malicious websites. It will protect your web gateway on site or in the cloud. “Web security” also refers to the steps you take to protect your own website.

Web Security | Cloud Web Security

Wireless security

Wireless networks are not as secure as wired ones. Without stringent security measures, installing a wireless LAN can be like putting Ethernet ports everywhere, including the parking lot. To prevent an exploit from taking hold, you need products specifically designed to protect a wireless network.

Cisco Aironet AP Module for Wireless Security

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