Port 5432: PostgreSQL
Default port of PostgreSQL.
- Port
- 5432
- Protocol
- TCP
- Service
- PostgreSQL
- Exposure
- Do not expose to the internet
What is port 5432 used for?
Database connections.
Is it safe to expose port 5432 to the internet?
Keep it private; use TLS and restrict addresses in pg_hba.conf.
If port 5432 seems closed or unreachable
- Check that the PostgreSQL service is running and listening on port 5432, not only on 127.0.0.1.
- Check the firewall on the host itself (Windows Defender Firewall, iptables, nftables, ufw) for a rule that allows TCP 5432.
- If the host is behind a router, confirm the forwarding rule points to the correct internal address and that your internet provider does not use carrier-grade NAT.
- Test from outside your own network. A port can be open locally and blocked at the edge, or the other way round.
Using port 5432 safely
Treat port 5432 as an internal-only service. Reach it through a VPN or an SSH tunnel, restrict it by source address, and keep the software that listens on it patched.
Check whether port 5432 is open on your host
The check connects from our server, so it shows what the internet can reach.
Open the port checker