COMPUTER THREATS SECURITY
WHAT IS A FIREWALL IN NETWORK SECURITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Open port 80 to allow SNMP service.
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Open port 80 to allow SMTP service.
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Open port 25 to allow SMTP service.
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Open port 110 to allow POP3 service.
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Open port 25 to allow SNMP service.
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Detailed explanation-1: -After blocking a number of ports to secure your server, you are unable to send email. To allow email service, which of the following needs to be done?-Open port 25 to allow SNMP service.
Detailed explanation-2: -Ports 25, 465, 587, or 2525 for SMTP have all been considered standard SMTP ports at some point, but only 587 or 2525 really should be considered for modern use.
Detailed explanation-3: -Open port 25 on your firewall so that Microsoft 365 or Office 365 can connect to your email servers. Ensure that your firewall accepts connections from all Microsoft 365 or Office 365 IP addresses.
Detailed explanation-4: -Port 587 and 465 are both frequently used for SMTPS traffic. Port 587 is often used to encrypt SMTP messages using STARTTLS, which allows the email client to establish secure connections by requesting that the mail server upgrade the connection through TLS.