- Require TLS and authenticated submission.
- Make sure the server is not an open relay.
- Publish SPF, DKIM and DMARC for the domain.
Port 2197: MNP data exchange
Port 2197 is assigned by IANA to mnp-exchange (MNP data exchange).
2197
How mnp-exchange works
EmailMail servers hand messages to each other over port 2197, 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 2197 dangerous?
We have no specific security note for port 2197. Its risk depends on the program actually listening on it. General advice for email services:
IANA registry entries for port 2197
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| mnp-exchange | 2197 | TCP, UDP | MNP data exchange | - | 2004-11 |
// source: IANA service name and port number registry
Which program uses port 2197, and is it reachable?
Linux
sudo ss -ltnup 'sport = :2197' # process listening on 2197
sudo lsof -nP -i :2197macOS
sudo lsof -nP -i :2197
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2197 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 2197 netstat -ano | findstr :2197
From another machine
nmap -p 2197 -sV <host> sudo nmap -sU -p 2197 <host> nc -zv <host> 2197
Block it in the firewall
sudo ufw deny 2197/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 2197" -Direction Inbound -LocalPort 2197 -Protocol TCP -Action Block # Windows
What is port 2197 used for?
Port 2197 is assigned by IANA to mnp-exchange (MNP data exchange).
Is port 2197 TCP or UDP?
Port 2197 is registered for TCP and UDP.
Is it safe to open port 2197?
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 2197 is open?
On Linux run "ss -ltnup 'sport = :2197'", on macOS "lsof -nP -i :2197", and on Windows "netstat -ano | findstr :2197" to see the local process. From another machine, "nmap -p 2197 <host>" shows whether it is reachable.