https://community.netapp.com/t5/Network-and-Storage-Protocols/Port-Usage/m-p/101063#M7588 <P>When I run the netstat –a command on my filers running 8.1.4.P6 7-mode I see that there are two ports, from unsigned port groups, that are in the LISTEN state and one is tied to a loopback address.</P><P>&nbsp;</P><P>*.951&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; *.*&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0 LISTEN&nbsp;</P><P>127.0.20.1.5939&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; *.*&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0 LISTEN&nbsp;</P><P>&nbsp;</P><P>What are these two ports being used for? The default /etc/service file is in place and rpcifio output does not show anything. I am thinking since there is a loopback address tied to one of the ports it must be used for some type of internal communication however; I would like to see some documentation explaining this?</P><P>I looked for some documentation explaining what could be using thiese ports on the NetApp Support site however; the only thing I could find is the published Port Usage article which was not much help.&nbsp;</P> Thu, 05 Jun 2025 05:00:34 GMT dwh123 2025-06-05T05:00:34Z https://community.netapp.com/t5/Network-and-Storage-Protocols/Port-Usage/m-p/101063#M7588 <P>When I run the netstat –a command on my filers running 8.1.4.P6 7-mode I see that there are two ports, from unsigned port groups, that are in the LISTEN state and one is tied to a loopback address.</P><P>&nbsp;</P><P>*.951&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; *.*&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0 LISTEN&nbsp;</P><P>127.0.20.1.5939&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; *.*&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0 LISTEN&nbsp;</P><P>&nbsp;</P><P>What are these two ports being used for? The default /etc/service file is in place and rpcifio output does not show anything. I am thinking since there is a loopback address tied to one of the ports it must be used for some type of internal communication however; I would like to see some documentation explaining this?</P><P>I looked for some documentation explaining what could be using thiese ports on the NetApp Support site however; the only thing I could find is the published Port Usage article which was not much help.&nbsp;</P> Thu, 05 Jun 2025 05:00:34 GMT https://community.netapp.com/t5/Network-and-Storage-Protocols/Port-Usage/m-p/101063#M7588 dwh123 2025-06-05T05:00:34Z