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// Databases & caches

Port 1201: Nucleus Sand Database Server

Port 1201 is assigned by IANA to nucleus-sand (Nucleus Sand Database Server).

1201

How nucleus-sand works

Databases & caches
app:1201nucleus-sand app:1201nucleus-sand

The application sends a SQL query to the nucleus-sand server on port 1201, which returns rows from its tables.

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
Databases & caches
01 Security

Is port 1201 dangerous?

We have no specific security note for port 1201. Its risk depends on the program actually listening on it. General advice for databases & caches services:

  • Bind the service to localhost or a private network, never to a public address.
  • Enable authentication, use per-application accounts and require TLS.
  • Watch for exposed Docker ports: publish them on 127.0.0.1 only.
02 Registry

IANA registry entries for port 1201

ServicePortTransportDescriptionReferenceUpdated
nucleus-sand 1201 TCP, UDP Nucleus Sand Database Server - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1201, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1201'      # process listening on 1201
sudo lsof -nP -i :1201

macOS

sudo lsof -nP -i :1201

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1201 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1201
netstat -ano | findstr :1201

From another machine

nmap -p 1201 -sV <host>
sudo nmap -sU -p 1201 <host>
nc -zv <host> 1201

Block it in the firewall

sudo ufw deny 1201/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1201" -Direction Inbound -LocalPort 1201 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1201 used for?

Port 1201 is assigned by IANA to nucleus-sand (Nucleus Sand Database Server).

Is port 1201 TCP or UDP?

Port 1201 is registered for TCP and UDP.

Is it safe to open port 1201?

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. Bind the service to localhost or a private network, never to a public address.

How do I check if port 1201 is open?

On Linux run "ss -ltnup 'sport = :1201'", on macOS "lsof -nP -i :1201", and on Windows "netstat -ano | findstr :1201" to see the local process. From another machine, "nmap -p 1201 <host>" shows whether it is reachable.

05 Related
:3306 MySQL / MariaDB tcp · udp · high risk :1433 Microsoft SQL Server tcp · udp · high risk :5432 PostgreSQL tcp · udp · high risk :6379 Redis tcp · critical risk :27017 MongoDB tcp · critical risk :9200 Elasticsearch tcp · udp · critical risk :1521 Oracle Database tcp · udp · high risk :11211 Memcached tcp · udp · high risk

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