- 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.
Port 150: SQL-NET
Port 150 is assigned by IANA to sql-net (SQL-NET).
150
How sql-net works
Databases & cachesThe application sends a SQL query to the sql-net server on port 150, 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
- Well-known (0-1023)
- Category
- Databases & caches
Is port 150 dangerous?
We have no specific security note for port 150. Its risk depends on the program actually listening on it. General advice for databases & caches services:
IANA registry entries for port 150
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| sql-net | 150 | TCP, UDP | SQL-NET | - | - |
// source: IANA service name and port number registry
Which program uses port 150, and is it reachable?
Linux
sudo ss -ltnup 'sport = :150' # process listening on 150
sudo lsof -nP -i :150macOS
sudo lsof -nP -i :150
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 150 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 150 netstat -ano | findstr :150
From another machine
nmap -p 150 -sV <host> sudo nmap -sU -p 150 <host> nc -zv <host> 150
Block it in the firewall
sudo ufw deny 150/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 150" -Direction Inbound -LocalPort 150 -Protocol TCP -Action Block # Windows
What is port 150 used for?
Port 150 is assigned by IANA to sql-net (SQL-NET).
Is port 150 TCP or UDP?
Port 150 is registered for TCP and UDP.
Is it safe to open port 150?
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 150 is open?
On Linux run "ss -ltnup 'sport = :150'", on macOS "lsof -nP -i :150", and on Windows "netstat -ano | findstr :150" to see the local process. From another machine, "nmap -p 150 <host>" shows whether it is reachable.
Other databases & caches ports
: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