topic Re: Remote TCP port monitoring in Open Q&A

Remote TCP port monitoring

AntonPineiro — Fri, 25 Oct 2024 08:12:42 GMT

Hi,

I am aware of NAM but source would be Synthetic ActiveGate.

Use case would be something as a host (not Synthetic ActiveGate) has TCP connectivity against some IP + port. Does Dynatrace have something for this monitoring out-of-the-box?

Best regards

Re: Remote TCP port monitoring

Peter_Youssef — Fri, 25 Oct 2024 11:58:42 GMT

Hello @AntonPineiro

As per the latest Hub technologies you can install : SNMP Autodiscovery
Then create synthetic monitors for the detected IPs and Ports.

Hoping it adds value.
KR,

Peter

Re: Remote TCP port monitoring

MostafaHussein — Fri, 25 Oct 2024 14:36:47 GMT

there's a work around you can use for this via local metric ingestion through OneAgent an this is a PowerShell script for doing this

function Test-TcpConnection { param( [string]$MetricName, [string]$IPAddress, [int]$Port, [System.Threading.ManualResetEvent]$StopEvent, [int]$Interval ) while ($StopEvent.WaitOne(0)) { try { $socket = New-Object System.Net.Sockets.TcpClient $socket.Connect($IPAddress, $Port) Write-Host "TCP connection to ${IPAddress}:${Port} successful" $result = 1 } catch { Write-Host "TCP connection to ${IPAddress}:${Port} failed: $_" $result = 0 } finally { if ($socket) { $socket.Close() } $headers = @{ 'Content-Type' = 'text/plain; charset=utf-8' } Invoke-RestMethod -Uri http://localhost:14499/metrics/ingest -Method Post -Body "${MetricName},destination-address=${IPAddress},destination-port=${Port} ${result}" -Headers @{'Content-Type' = 'text/plain; charset=utf-8'} Start-Sleep -Seconds $Interval } } Write-Host "Script stopped." } # Create a manual reset event to control the script's execution $stopEvent = New-Object System.Threading.ManualResetEvent False # Function to stop the script function Stop-Script { $stopEvent.Set() } # Call the Test-TcpConnection function Test-TcpConnection -MetricName "host.tcp-test.status" -IPAddress 127.0.0.1 -Port 80 -StopEvent $stopEvent -Interval 20

using this approach you can ingest metrics from OneAgent on the desired machine as mentioned in the code the interval is each 20 seconds to test connectivity with <IP_ADDRESS>:<PORT> and you've status of 0 means that connection failed or 1 that connection successfully established, accordingly you can make custom event for alerting using the metric `host.tcp-test.status` to get notified when metric value is 0, you can replace xxxx with the real host name you're ingesting your metric from if you willing to use it from multiple servers to use server name as dimension for filtering data points later.

when running this script from PowerShell you should find it in dynatrace like this

references:
https://docs.dynatrace.com/docs/shortlink/local-api#example

https://docs.dynatrace.com/docs/shortlink/metric-events

Re: Remote TCP port monitoring

AntonPineiro — Fri, 25 Oct 2024 15:55:55 GMT

Hi,

I am not sure this will work because Synthetic monitor is linked to ActiveGate. I would like to check from anothers machines that they are not ActiveGates.

But thank you!

Best regards

Re: Remote TCP port monitoring

AntonPineiro — Fri, 25 Oct 2024 15:59:32 GMT

Hi,

I was already thought about that but:

I cannot deploy custom scripts in targets, no permissions.
Extra cost by metrics ingestion.

I would like to see some out-the-box solution already covered by OneAgent, since agent is already there.

But thank you so much for your detailed answer.

Best regards

Re: Remote TCP port monitoring

StrangerThing — Fri, 25 Oct 2024 16:15:07 GMT

I'd love for this functionality to be built-in as a feature. The OneAgent network monitor already knows the common connections that are made to/from the host and could automatically setup monitors for these with a click of a button. Should I put this in as a product idea?

Re: Remote TCP port monitoring

StrangerThing — Fri, 25 Oct 2024 17:16:28 GMT

Automatic Network Monitoring at Host level via Davis/OneAgent - Dynatrace Community

Re: Remote TCP port monitoring

MostafaHussein — Fri, 25 Oct 2024 22:22:10 GMT

strongly recommend

Re: Remote TCP port monitoring

AntonPineiro — Sat, 26 Oct 2024 13:07:00 GMT

Thank you all!

I have just voted that product idea!

Best regards

Re: Remote TCP port monitoring

Peter_Youssef — Sat, 26 Oct 2024 14:23:10 GMT

All the best @AntonPineiro

Hopefully it will be considered in upcoming releases.

KR,

Peter.