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What does the following entry mean? Is that mean someone has connected to the server from this IP or somthing else?

Nov 23 15:33:54 www-prod-2 snmpd[1573]: Connection from UDP: [66.151.147.194]:47011->[xxx.xxx.xxx.xxx]:161
Diamond
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1Bladesforhire
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    instead of down voting perhaps you could point out why this isn't a good question? it is very specific and I could use a little help. – 1Bladesforhire Nov 24 '15 at 18:47
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    This is meant to be a site for professional system administrators. This question does not show an understanding of the principles involved consistent with a professional system administrator thus the down votes. – Catherine MacInnes Nov 24 '15 at 18:52
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    Your question doesn't show any research attempt or basic understanding of what you are posting about. You are just posting a log entry, without any explanation or reference to any real problem whatsoever. You can edit your question to put some more information and background information and your problem. – Diamond Nov 24 '15 at 18:55
  • It's not really a UDP connection. It's an SNMP connection, over UDP. – David Schwartz Nov 24 '15 at 19:12
  • thansks bangal. I tried that yesterday with server info, what I had tried etc, but that also got down voted so I thought maybe something more specific would get a response. – 1Bladesforhire Nov 24 '15 at 19:29

1 Answers1

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This looks like a connection or connection attempt from ip 66.151.147.194 to the SNMP port of the Computer. SNMP uses Port 161 (TCP/UDP).

Simple Network Management Protocol (SNMP) is a popular protocol for network management. It is used for collecting information from, and configuring, network devices, such as servers, printers, hubs, switches, and routers on an Internet Protocol (IP) network.

https://technet.microsoft.com/en-us/library/cc776379%28v=ws.10%29.aspx

If you have no idea what it is, then you better check your server's configuration for SNMP service and make sure it is secured or properly configured.

Diamond
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  • Thank you this is what I was looking for a direction to start researching. – 1Bladesforhire Nov 24 '15 at 19:27
  • You are welcome. You can just google for SNMP, or a combination with the Operating System you are using, you will surely find a lots of useful info. – Diamond Nov 24 '15 at 19:41