CyberHunter
LinkedIn profile - Bastien Cordier Email: contact@bastiencordier.pro
// Monitoring & logging

Port 3520: Netvion Galileo Log Port

Port 3520 is assigned by IANA to galileolog (Netvion Galileo Log Port).

3520

How galileolog works

Monitoring & logging
monitoringdevicegalileolog monitoringdevicegalileolog

The monitoring server collects metrics, alerts or logs from devices over port 3520.

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 3520 dangerous?

We have no specific security note for port 3520. 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 3520

ServicePortTransportDescriptionReferenceUpdated
galileolog 3520 TCP, UDP Netvion Galileo Log Port - 2002-06

// source: IANA service name and port number registry

03 Check it

Which program uses port 3520, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3520'      # process listening on 3520
sudo lsof -nP -i :3520

macOS

sudo lsof -nP -i :3520

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3520 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3520
netstat -ano | findstr :3520

From another machine

nmap -p 3520 -sV <host>
sudo nmap -sU -p 3520 <host>
nc -zv <host> 3520

Block it in the firewall

sudo ufw deny 3520/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3520" -Direction Inbound -LocalPort 3520 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3520 used for?

Port 3520 is assigned by IANA to galileolog (Netvion Galileo Log Port).

Is port 3520 TCP or UDP?

Port 3520 is registered for TCP and UDP.

Is it safe to open port 3520?

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 3520 is open?

On Linux run "ss -ltnup 'sport = :3520'", on macOS "lsof -nP -i :3520", and on Windows "netstat -ano | findstr :3520" to see the local process. From another machine, "nmap -p 3520 <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

Latest vulnerability news

All news