- 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.
Port 9340: gRPC Routing Information Base Interface
Port 9340 is assigned by IANA to gribi (gRPC Routing Information Base Interface).
9340
How gribi works
Network servicesThe client sends a request to port 9340 and the gribi 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
- Network services
Is port 9340 dangerous?
We have no specific security note for port 9340. Its risk depends on the program actually listening on it. General advice for network services services:
IANA registry entries for port 9340
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| gribi | 9340 | TCP | gRPC Routing Information Base Interface | - | 2022-03-29 |
| - | 9340 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 9340, and is it reachable?
Linux
sudo ss -ltnup 'sport = :9340' # process listening on 9340
sudo lsof -nP -i :9340macOS
sudo lsof -nP -i :9340
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 9340 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 9340 netstat -ano | findstr :9340
From another machine
nmap -p 9340 -sV <host> nc -zv <host> 9340
Block it in the firewall
sudo ufw deny 9340/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 9340" -Direction Inbound -LocalPort 9340 -Protocol TCP -Action Block # Windows
What is port 9340 used for?
Port 9340 is assigned by IANA to gribi (gRPC Routing Information Base Interface).
Is port 9340 TCP or UDP?
Port 9340 is registered for TCP.
Is it safe to open port 9340?
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 9340 is open?
On Linux run "ss -ltnup 'sport = :9340'", on macOS "lsof -nP -i :9340", and on Windows "netstat -ano | findstr :9340" to see the local process. From another machine, "nmap -p 9340 <host>" shows whether it is reachable.
Other network services ports
:53 DNS tcp · udp · moderate risk :135 MS RPC tcp · udp · high risk :123 NTP udp · tcp · moderate risk :67 DHCP server udp · tcp · moderate risk :111 rpcbind tcp · udp · high risk :9100 Raw printing (JetDirect) tcp · udp · high risk :631 IPP / CUPS tcp · udp · high risk :5353 mDNS udp · tcp · moderate risk