- Require TLS and authenticated submission.
- Make sure the server is not an open relay.
- Publish SPF, DKIM and DMARC for the domain.
Port 2246: PacketCable MTA Addr Map
Port 2246 is assigned by IANA to pc-mta-addrmap (PacketCable MTA Addr Map).
2246
How pc-mta-addrmap works
EmailMail servers hand messages to each other over port 2246, 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 2246 dangerous?
We have no specific security note for port 2246. Its risk depends on the program actually listening on it. General advice for email services:
IANA registry entries for port 2246
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| pc-mta-addrmap | 2246 | TCP, UDP | PacketCable MTA Addr Map | - | - |
// source: IANA service name and port number registry
Which program uses port 2246, and is it reachable?
Linux
sudo ss -ltnup 'sport = :2246' # process listening on 2246
sudo lsof -nP -i :2246macOS
sudo lsof -nP -i :2246
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2246 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 2246 netstat -ano | findstr :2246
From another machine
nmap -p 2246 -sV <host> sudo nmap -sU -p 2246 <host> nc -zv <host> 2246
Block it in the firewall
sudo ufw deny 2246/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 2246" -Direction Inbound -LocalPort 2246 -Protocol TCP -Action Block # Windows
What is port 2246 used for?
Port 2246 is assigned by IANA to pc-mta-addrmap (PacketCable MTA Addr Map).
Is port 2246 TCP or UDP?
Port 2246 is registered for TCP and UDP.
Is it safe to open port 2246?
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 2246 is open?
On Linux run "ss -ltnup 'sport = :2246'", on macOS "lsof -nP -i :2246", and on Windows "netstat -ano | findstr :2246" to see the local process. From another machine, "nmap -p 2246 <host>" shows whether it is reachable.