Following are the steps you have to take to set up a firewall:
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Username/password: Alter the default password of a firewall device.
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Remote Administration: Make sure the Remote Administration function is turned off at all times.
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Configure suitable ports for the web server, FTP, and other programmes to operate correctly.
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To avoid conflicts, turn down the DHCP server before installing a firewall.
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Logging: To examine firewall troubleshoots and logs, enable logging.
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Policies: Use the firewall to set up robust security policies.