- 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.
Port 9339: gRPC Network Mgmt/Operations Interface
Port 9339 is assigned by IANA to gnmi-gnoi (gRPC Network Mgmt/Operations Interface).
9339
How gnmi-gnoi works
Other servicesThe client sends a request to port 9339 and the gnmi-gnoi service answers.
- 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
- Other services
Is port 9339 dangerous?
We have no specific security note for port 9339. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 9339
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| gnmi-gnoi | 9339 | TCP | gRPC Network Mgmt/Operations Interface | - | 2019-05-09 |
| - | 9339 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 9339, and is it reachable?
Linux
sudo ss -ltnup 'sport = :9339' # process listening on 9339
sudo lsof -nP -i :9339macOS
sudo lsof -nP -i :9339
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 9339 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 9339 netstat -ano | findstr :9339
From another machine
nmap -p 9339 -sV <host> nc -zv <host> 9339
Block it in the firewall
sudo ufw deny 9339/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 9339" -Direction Inbound -LocalPort 9339 -Protocol TCP -Action Block # Windows
What is port 9339 used for?
Port 9339 is assigned by IANA to gnmi-gnoi (gRPC Network Mgmt/Operations Interface).
Is port 9339 TCP or UDP?
Port 9339 is registered for TCP.
Is it safe to open port 9339?
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 9339 is open?
On Linux run "ss -ltnup 'sport = :9339'", on macOS "lsof -nP -i :9339", and on Windows "netstat -ano | findstr :9339" to see the local process. From another machine, "nmap -p 9339 <host>" shows whether it is reachable.
Other other services ports
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp