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Which port must be active on a firewall for SNMP traffic?
110
161
25
143
SNMP uses UDP port 161 and it must be active on firewall to allow traffic.
The other choices are the default unencrypted ports for various e-mail protocols:
TCP Port 110 is for POP3 (Post Office Protocol) TCP Port 25 is for SMTP (Simple Mail Transfer Protocol) Port 143 is for IMAP4 (Internet Message Access Protocol)
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