Finding the culprit for TCP_StatsCollector ConnectionsEstablished alert for Windows collectors
From the collector’s device page in the LM Portal or the collectors page, get to a debug console, then here’s your !POSH one-liner to get info about the destination device that is holding your ports captive. netstat -an| sls establish | foreach { ($_ -split "\s+")[3] } | group | sort count | select count, name -last 10 In the Netstat, a shows all, n shows IP addresses rather than solving the DNS for it. TheSelect-String (aliased as sls)passes only the “Established” connection entries from the netstat down the pipeline. The foreach{} splits each line ($_ is the current object being iterated by the foreach loop) on contiguous whitespace (I use this a lot!) and takes the third element (remote address:port) to passdown the pipeline It then passes Group-Object (aliased as group) which bundles identical strings and Sort-Object (aliased as sort)by the count property of the group object. The select displays grabs the calculated match count and the name properties to limit display and just shows the -last 10 of them (which are the biggest number of matched lines due to the sort previously applied. This should give you the target/s for troubleshooting further.LogicMonitor Collector Ports to be used while monitoring end-user devices
Review a full list of protocols and ports required for monitoring User Activity. This post will provide information regarding the ports, protocols, use case & configuration settings if required that is been used in general, with respect to LM platform. Using the " <port>/<protocol> " format is a common and standardized way to indicate network ports along with the associated protocols. This format helps provide a clear and concise representation of the port and protocol being discussed below : Inbound communication : Port Protocol Use Case Configuration Setting 162 UDP SNMP traps received from target devices eventcollector.snmptrap.address 514 UDP Syslog messages received from target devices eventcollector.syslog.port 2055 UDP NetFlow data received from target devices netflow.ports 6343 UDP sFlow data received from target devices netflow.sflow.ports 7214 HTTP/ Proprietary Communication from customJobMonitorsto Collector service httpd.port 2056 UDP JFlow data received from target devices Outbound communication : Port Protocol Use Case Configuration Setting 443 HTTP/TLS Communication between the Collector and the LogicMonitor data center (port 443 must be permitted to access LogicMonitor’spublic IP addresses; If your environment does not allow the Collector to directly connect with the LogicMonitor data centers, you canconfigure the Collector to communicate through a proxy.) N/A Other non-privileged SNMP, WMI, HTTP, SSH, JMX, etc. Communication between Collector and target resources assigned for monitoring N/A Internal communication : Port Protocol Use Case Configuration Setting 7211 Proprietary Communication between Watchdog and Collector services to OS Proxy service (sbwinproxy/sblinuxproxy) sbproxy.port 7212 Proprietary Communication from Watchdog service to Collector service agent.status.port 7213 Proprietary Communication from Collector service to Watchdog service watchdog.status.port 15003 Proprietary Communication between Collector service and its service wrapper N/A 15004 Proprietary Communication between Collector service and its service wrapper N/A Destination Ports : Port Protocol Use Case 135 TCP Port 135 is used for DCOM's initial communication and RPC (Remote Procedure Call) endpoint mapping..DCOM often uses higher port numbers in therange of 49152 to 65535 fordynamically allocated ports 22 TCP TCP for SSH connections 80 UDP NetFlow data received from target devices 443 UDP sFlow data received from target devices 25 HTTP/ Proprietary Communication from customJobMonitorsto Collector service 161 UDP JFlow data received from target devices 1433 TCP/UDP TCP for Microsoft SQL 1434 TCP/UDP The protocol used by port 1434 depends on the applicationthatis using the port. For example, SQL Server uses TCP forcommunication with clients, while the SQL Server Browserservice uses UDP 1521 TCP/UDP TCP/UDP to listen for database connections from Oracle clients 3306 TCP/UDP TCP/UDP for MySQL 5432 TCP TCP for PostgreSQL 123 NTP Connection from the library to an external NTP server. 445 TCP Server Message Block (SMB) protocol over TCP/IP LM Collector's monitoring protocols support a number of other monitoring protocols that can be incorporated into this list based on your preferences.Our LM collector supports a number of different monitoring protocols, so we can add to this list as necessary. Hopefully, through these details shared above, we will be able to understand what ports/protocols are used in LM platform. Thanks!
