software firewalls © n. ganesan, ph.d.. module objectives explore the features of a software...
TRANSCRIPT
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Software Firewalls
© N. Ganesan, Ph.D.
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Module Objectives
• Explore the features of a software firewall such as Zone Alarm Pro
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Introduction
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Features
• Inbound traffic protection• Outbound traffic protection• Optional e-mail protection• Optional antivirus monitoring
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Types of Protection and Control
• Firewall Protection• Program Control• Privacy Protection• Identity Protection
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Protection Alerts
• Program alerts• Firewall alerts
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Program Alert Example
• In the following example, program alert for the ping command will be demonstrated
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Firewall Event
• Informs intrusion efforts
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Zoning for Access Control
• Internet zone– All computers fall into this category– They are generally unknown computers
• Trusted zone– Permission is automatically given to access
computers in the trusted zone
• Bad zone– Access to computers in this zone are
explicitly denied
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Disconnecting from Internet
• Stop button• Internet lock
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Additional Information
• Use the help feature
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Overview of ZoneAlarm Pro
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Firewall Zone Settings
• High– Explicit permission must be given for
access
• Medium– Access must be blocked explicitly
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Blocked Zone
• Advanced control is possible for blocked zones
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Adding and Removing Networks to and from Zones
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Assigning Networks
• Networks can be assigned to trusted and internet zones based on:– Host/site– IP address – IP range– Subnet
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Computers with Access
• In the previous example, the computers with the following range of IP address will have network access privilege– 130.182.215.0 to 130.182.215.254
• The values defined could also be edited
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Can be removed as well.
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Rule Based Access Control
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Purpose
• Traffic can be controlled based on source address, destination address, protocol and time of the day
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Expert Firewall
• Access control (allow of blocks) can be exercised based on the following parameters:– Source– Destination– Protocol– Time
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Auto-Lock
• Auto lock can be set to be involved when the computer is inactive for a given period of time
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Program Access Control
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Individual Program Control
• This is perhaps the most frequently used option
• Access to the network for a program can be set to the following – Allow – Block X– Ask ?
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Program Control Properties
• Allow– Allows the program to access the network
• Ask– Ask each time the program tries to access the network
• Block– Block access without asking
• In general, one may want to block the program acting as a server
• Moreover, whenever in doubt, access could be set to “Ask”
• As seen in the next slide, new program could also be added to the list of programs that need to be controlled with respect to network access
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Individual program security.
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Antivirus Monitoring
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Email Protection
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Newattachment types
can be added.
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Privacy
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Customizing cache cleaning.
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Cookie Control, Ad Blocking and Mobile Code Control
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Cookie control.
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Ad blocking.
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Mobile code execution control.
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Site Access Control
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ID Lock
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Alerts and Logs
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The End