Network security by quontra solutions uk

info@quontrasolutions.co.uk
Network Security
Call us : 20-3734-1498/99
www.quontrasolutions.co.uk Call us : 20-3734-1498/99

Network Security
 Security Devices
 Firewalls
 Network Access Security
 User Authentication
 Device Security
 Common Security Threats

Security Devices
 Explain the function Of Hardware and Software
security devices.
 Network Based Firewall
 Host Based Firewall
 IDS
 IPS
 VPN Concentrator

Host Based Firewall
 Software Based Protection on a device
 Sees all the Traffic
 Difficult to manage
large groups

Windows Firewall with Advanced Security

Network Based Firewall
 Filters Traffic By Port Number
 Can Encrypt traffic in/out of the network.
 Can proxy traffic
 Most firewalls can be Layer 3 devices (routers).

Network Based Firewall
 Advantages
 Protects many devices at once
 High-speed
 Disadvantages
 Limited Visibility into encrypted Information

IDS/IPS
 Intrusion Detection System
 Intrusion Prevention System
 Intrusions
 Exploits against Operating Systems , applications etc.
 Bufferoverflows and other vulnerabilities
 Detection Vs Prevention
 Detection – Alarm or Alert
 Prevention – Stop it before it gets into the network.

IDS/IPS
 Advantages
 Watches all traffic through a network link
 Can completely stop bad traffic
 Disadvantages
 Limited Visibility into encrypted Data
 Yet Another device on the Network

VPN concentrator

Identify Common Security Threats and
Mitigations
 Security Threats
 Dos ,viruses, worms ,attackers ,Man in the
middle attack ,Smurf ,Social engineering
(phishing)
 Mitigation Techniques
 Policies and Procedures ,user training ,patch
and updates

Denial Of Service
 Anything that prevents a device from providing
normal services
 DoS /DDoS
 Denial Of Service /Distributed Denial of service
 Smurf Attacks
 Ping sents to a broadcast address were duplicated to all
IP addresses on the subnets by the routers
 We fixed that in 1999

Viruses and Worms
 Viruses infect files and duplicate by copying
themselves with other documents
 Worms don’t need any other files or programs in
order to infect other devices
 Malware is a catch-all term for viruses ,spywares ,
adwares ,worms and other bad stuff

Man in the Middle Attack
 A form of electronic eavesdropping
 Especially useful for encrypted communication

Social Engineering
 Major Threats
 Electronically Undetectable
 Suspicious Telephone Call
 Don’t give any information over the Telephone
 Look out for unattended persons
 Badges
 Processes

Phishing
 Electronic Version Of Social Engineering

Mitigation Techniques
 Policies and Procedures
 User Training
 Patches and Updates

Summary
 DoS (Denial Of Service) or DDoS (Distributed
DoS) prevent a device from providing normal services.
 Man in the Middle Attack method can hackers use
to intercept encrypted communication between
stations
 Phishing is the electronic method of social
engineering to gather personal information.

Call : 20-3734-1498/99
Email: info@quontrasolutions.co.uk
http://www.quontrasolutions.co.uk

Network security by quontra solutions uk

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