CyberHunter
Local dataset, no network
// Network services

Port 567: banyan-rpc

Port 567 is assigned by IANA to banyan-rpc (banyan-rpc).

567

How banyan-rpc works

Network services
client:567banyan-rpcresponse client:567banyan-rpcresponse

The client sends a request to port 567 and the banyan-rpc service answers.

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
Network services
01 Security

Is port 567 dangerous?

We have no specific security note for port 567. Its risk depends on the program actually listening on it. General advice for network services services:

  • Answer only the networks that need the service (no open resolvers, relays or reflectors).
  • UDP services can be abused for DDoS amplification: rate-limit or block them at the edge.
  • Disable legacy test services that have no use in production.
02 Registry

IANA registry entries for port 567

ServicePortTransportDescriptionReferenceUpdated
banyan-rpc 567 TCP, UDP banyan-rpc - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 567, and is it reachable?

Linux

sudo ss -ltnup 'sport = :567'      # process listening on 567
sudo lsof -nP -i :567

macOS

sudo lsof -nP -i :567

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 567 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 567
netstat -ano | findstr :567

From another machine

nmap -p 567 -sV <host>
sudo nmap -sU -p 567 <host>
nc -zv <host> 567

Block it in the firewall

sudo ufw deny 567/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 567" -Direction Inbound -LocalPort 567 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 567 used for?

Port 567 is assigned by IANA to banyan-rpc (banyan-rpc).

Is port 567 TCP or UDP?

Port 567 is registered for TCP and UDP.

Is it safe to open port 567?

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. Answer only the networks that need the service (no open resolvers, relays or reflectors).

How do I check if port 567 is open?

On Linux run "ss -ltnup 'sport = :567'", on macOS "lsof -nP -i :567", and on Windows "netstat -ano | findstr :567" to see the local process. From another machine, "nmap -p 567 <host>" shows whether it is reachable.

05 Related
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