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// File transfer & sharing

Port 8432: PostgreSQL Backup

Port 8432 is assigned by IANA to pgbackrest (PostgreSQL Backup).

8432

How pgbackrest works

File transfer & sharing
client:84321/32/33/3pgbackrest client:84321/32/33/3pgbackrest

Files are sent over port 8432 in pieces and reassembled on the other side.

Transport
TCP
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
File transfer & sharing
01 Security

Is port 8432 dangerous?

We have no specific security note for port 8432. Its risk depends on the program actually listening on it. General advice for file transfer & sharing services:

  • Prefer encrypted protocols (SFTP, FTPS, SMB 3 with encryption).
  • Disable anonymous access and restrict shares or exports to known hosts.
  • Never publish file sharing protocols to the Internet.
02 Registry

IANA registry entries for port 8432

ServicePortTransportDescriptionReferenceUpdated
pgbackrest 8432 TCP PostgreSQL Backup - 2022-01-26
-8432-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 8432, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8432'      # process listening on 8432
sudo lsof -nP -i :8432

macOS

sudo lsof -nP -i :8432

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8432 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8432
netstat -ano | findstr :8432

From another machine

nmap -p 8432 -sV <host>
nc -zv <host> 8432

Block it in the firewall

sudo ufw deny 8432/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8432" -Direction Inbound -LocalPort 8432 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 8432 used for?

Port 8432 is assigned by IANA to pgbackrest (PostgreSQL Backup).

Is port 8432 TCP or UDP?

Port 8432 is registered for TCP.

Is it safe to open port 8432?

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. Prefer encrypted protocols (SFTP, FTPS, SMB 3 with encryption).

How do I check if port 8432 is open?

On Linux run "ss -ltnup 'sport = :8432'", on macOS "lsof -nP -i :8432", and on Windows "netstat -ano | findstr :8432" to see the local process. From another machine, "nmap -p 8432 <host>" shows whether it is reachable.

05 Related
:445 SMB tcp · udp · critical risk :21 FTP tcp · udp · sctp · high risk :139 NetBIOS Session tcp · udp · high risk :69 TFTP udp · tcp · high risk :2049 NFS tcp · udp · sctp · high risk :873 rsync tcp · udp · high risk :20 File Transfer [Default Data] tcp · udp · sctp :115 Simple File Transfer Protocol tcp · udp

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