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// Monitoring & logging

Port 2552: Call Logging

Port 2552 is assigned by IANA to call-logging (Call Logging).

2552

How call-logging works

Monitoring & logging
monitoringdevicecall-logging monitoringdevicecall-logging

The monitoring server collects metrics, alerts or logs from devices over port 2552.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Monitoring & logging
01 Security

Is port 2552 dangerous?

We have no specific security note for port 2552. Its risk depends on the program actually listening on it. General advice for monitoring & logging services:

  • Restrict management and monitoring protocols to the monitoring network.
  • Replace community strings and default credentials.
  • Send logs over TLS.
02 Registry

IANA registry entries for port 2552

ServicePortTransportDescriptionReferenceUpdated
call-logging 2552 TCP, UDP Call Logging - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2552, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2552'      # process listening on 2552
sudo lsof -nP -i :2552

macOS

sudo lsof -nP -i :2552

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2552 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2552
netstat -ano | findstr :2552

From another machine

nmap -p 2552 -sV <host>
sudo nmap -sU -p 2552 <host>
nc -zv <host> 2552

Block it in the firewall

sudo ufw deny 2552/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2552" -Direction Inbound -LocalPort 2552 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2552 used for?

Port 2552 is assigned by IANA to call-logging (Call Logging).

Is port 2552 TCP or UDP?

Port 2552 is registered for TCP and UDP.

Is it safe to open port 2552?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Restrict management and monitoring protocols to the monitoring network.

How do I check if port 2552 is open?

On Linux run "ss -ltnup 'sport = :2552'", on macOS "lsof -nP -i :2552", and on Windows "netstat -ano | findstr :2552" to see the local process. From another machine, "nmap -p 2552 <host>" shows whether it is reachable.

05 Related
:161 SNMP udp · tcp · high risk :162 SNMP trap udp · tcp · moderate risk :9090 Prometheus / admin consoles tcp · udp · high risk :514 Syslog udp · tcp · moderate risk :6514 Syslog over TLS tcp · udp · dccp · low risk :5601 Kibana tcp · udp · high risk :391 SynOptics SNMP Relay Port tcp · udp :412 Trap Convention Port tcp · udp

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