- 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 9388: D2D Data Transfer Service
Port 9388 is assigned by IANA to d2ddatatrans (D2D Data Transfer Service).
9388
How d2ddatatrans works
Other servicesThe client sends a request to port 9388 and the d2ddatatrans 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 9388 dangerous?
We have no specific security note for port 9388. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 9388
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| d2ddatatrans | 9388 | TCP | D2D Data Transfer Service | - | 2008-12-24 |
| - | 9388 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 9388, and is it reachable?
Linux
sudo ss -ltnup 'sport = :9388' # process listening on 9388
sudo lsof -nP -i :9388macOS
sudo lsof -nP -i :9388
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 9388 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 9388 netstat -ano | findstr :9388
From another machine
nmap -p 9388 -sV <host> nc -zv <host> 9388
Block it in the firewall
sudo ufw deny 9388/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 9388" -Direction Inbound -LocalPort 9388 -Protocol TCP -Action Block # Windows
What is port 9388 used for?
Port 9388 is assigned by IANA to d2ddatatrans (D2D Data Transfer Service).
Is port 9388 TCP or UDP?
Port 9388 is registered for TCP.
Is it safe to open port 9388?
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 9388 is open?
On Linux run "ss -ltnup 'sport = :9388'", on macOS "lsof -nP -i :9388", and on Windows "netstat -ano | findstr :9388" to see the local process. From another machine, "nmap -p 9388 <host>" shows whether it is reachable.
Other other services ports
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