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Can I monitor specific TCP/UDP ports on a Linux server with SNMP?

Italia998 asked
Last Modified: 2012-05-12
I am currently trying to teach myself Cacti/SNMP.

My question is, can I monitor specific tcp/udp ports on a Linux server via SNMP?

I have used snmpwalk to see all the MIB's, but I cannot tell which MIB would be for which port and further into that, which one would be the in/out traffic MIB.

Can someone give me the exact MIB/OID for say, tcp/udp port 80 on a CentOS server and explain how I could have determined that on my own?
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