- Require TLS and authenticated submission.
- Make sure the server is not an open relay.
- Publish SPF, DKIM and DMARC for the domain.
Port 6785: DGPF Individual Exchange
Port 6785 is assigned by IANA to dgpf-exchg (DGPF Individual Exchange).
6785
How dgpf-exchg works
EmailMail servers hand messages to each other over port 6785, one hop at a time, until the recipient's server.
- Transport
- TCP · UDP
- 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
Is port 6785 dangerous?
We have no specific security note for port 6785. Its risk depends on the program actually listening on it. General advice for email services:
IANA registry entries for port 6785
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| dgpf-exchg | 6785 | TCP, UDP | DGPF Individual Exchange | - | 2006-04 |
// source: IANA service name and port number registry
Which program uses port 6785, and is it reachable?
Linux
sudo ss -ltnup 'sport = :6785' # process listening on 6785
sudo lsof -nP -i :6785macOS
sudo lsof -nP -i :6785
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 6785 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 6785 netstat -ano | findstr :6785
From another machine
nmap -p 6785 -sV <host> sudo nmap -sU -p 6785 <host> nc -zv <host> 6785
Block it in the firewall
sudo ufw deny 6785/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 6785" -Direction Inbound -LocalPort 6785 -Protocol TCP -Action Block # Windows
What is port 6785 used for?
Port 6785 is assigned by IANA to dgpf-exchg (DGPF Individual Exchange).
Is port 6785 TCP or UDP?
Port 6785 is registered for TCP and UDP.
Is it safe to open port 6785?
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. Require TLS and authenticated submission.
How do I check if port 6785 is open?
On Linux run "ss -ltnup 'sport = :6785'", on macOS "lsof -nP -i :6785", and on Windows "netstat -ano | findstr :6785" to see the local process. From another machine, "nmap -p 6785 <host>" shows whether it is reachable.