CyberHunter
Local dataset, no network
// Other services

Port 317: Zannet

Port 317 is assigned by IANA to zannet (Zannet).

317

How zannet works

Other services
client:317zannetresponse client:317zannetresponse

The client sends a request to port 317 and the zannet 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
Other services
01 Security

Is port 317 dangerous?

We have no specific security note for port 317. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 317

ServicePortTransportDescriptionReferenceUpdated
zannet 317 TCP, UDP Zannet - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 317, and is it reachable?

Linux

sudo ss -ltnup 'sport = :317'      # process listening on 317
sudo lsof -nP -i :317

macOS

sudo lsof -nP -i :317

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 317 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 317
netstat -ano | findstr :317

From another machine

nmap -p 317 -sV <host>
sudo nmap -sU -p 317 <host>
nc -zv <host> 317

Block it in the firewall

sudo ufw deny 317/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 317" -Direction Inbound -LocalPort 317 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 317 used for?

Port 317 is assigned by IANA to zannet (Zannet).

Is port 317 TCP or UDP?

Port 317 is registered for TCP and UDP.

Is it safe to open port 317?

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. Close the port if nothing on the host needs it.

How do I check if port 317 is open?

On Linux run "ss -ltnup 'sport = :317'", on macOS "lsof -nP -i :317", and on Windows "netstat -ano | findstr :317" to see the local process. From another machine, "nmap -p 317 <host>" shows whether it is reachable.

05 Related
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