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What is firewall is and why it is necessary?

Updated: 8/19/2019
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12y ago

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A firewall is a device made to either allow or deny transmissions from other computers (particularly from the internet) to protect the computer from unauthorized access.

A firewall is necessary because, as was said, it blocks unauthorized access by hackers and disallows any files that may contain harmful data like viruses and malware.

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Does firewall ON is necessary while connecting 2 PC s with IP address?

It isn't necessary to run a firewall at all, but it is a prudent practice when connecting to the internet.


Is it necessary to have a firewall?

Yes ,If you do not have one Zone Alarm is recommended


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Not usually. Your firewall has detected it is potentially unsafe and has given you fair warning. Unless the site appears on a blacklist as a false positive, an e-mail is not necessary. Check your firewall for options.


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To open a site blocked by Sonicwall, it is necessary to change the firewall settings. This can be done by logging into the firewall and clicking the "wizards" button. This will open up a configuration wizard which will give tips and guidance on how to configure the firewall. This wizard can also be used to reset the firewall to factory defaults.


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