Nos Security Software And Its Features, Different Server Roles And Others
2.2 Explain NOS security software and its features.
Software firewall
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Port blocking: Certain ports on the server can be blocked.
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Application exception: An exception can be added to the firewall to allow a specific application to communicate through firewall.
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ACL resides on a router, firewalls or computers and decides who can access the network and who cannot. That means it enable or deny traffic. It specify which user or group of users are allowed what level of access on which resource. It makes use of IP addresses and port numbers.
Malware protection software
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Anti-Virus: This software can examine a computer for any infections as well as monitor computer activity and scan new documents that might contain a virus this action is performed when files are opened, created, or closed. If a virus is detected, options generally include cleaning the file of the virus, quarantining the infected fire, or deleting the file. Anti-virus scan files by attempting to match known virus patterns or signatures against potentially infected files. Software contains a virus scanning engine and a regularly updated signature file. The Anti-virus software vendor extracts a sequence of bytes found in the virus as a virus signature. Signatures from all the different computer viruses are organized in a database, which the virus scanning engine uses to search predefined areas of files.
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Pop-up Blockers and Anti-Spyware: A pop-up is a small Web browser window that appears over the Web site that is being viewed. Most pop-up windows are created by advertisers and launch as soon as a new Web site is visited. A pop-up blocker can be either a separate program or a feature incorporated within a browser that stops pop-up advertisements from appearing. As a separate program, pop-up blockers are often part of a package known as anti-spyware that helps prevent computers from becoming infected by different types of spyware.
