- Require TLS and authenticated submission.
- Make sure the server is not an open relay.
- Publish SPF, DKIM and DMARC for the domain.
Port 4569: Inter-Asterisk eXchange
Port 4569 is assigned by IANA to iax (Inter-Asterisk eXchange).
4569
How iax works
EmailMail servers hand messages to each other over port 4569, 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 4569 dangerous?
We have no specific security note for port 4569. Its risk depends on the program actually listening on it. General advice for email services:
IANA registry entries for port 4569
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| iax | 4569 | TCP, UDP | Inter-Asterisk eXchange | RFC 5456 | - |
// source: IANA service name and port number registry
Which program uses port 4569, and is it reachable?
Linux
sudo ss -ltnup 'sport = :4569' # process listening on 4569
sudo lsof -nP -i :4569macOS
sudo lsof -nP -i :4569
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4569 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 4569 netstat -ano | findstr :4569
From another machine
nmap -p 4569 -sV <host> sudo nmap -sU -p 4569 <host> nc -zv <host> 4569
Block it in the firewall
sudo ufw deny 4569/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 4569" -Direction Inbound -LocalPort 4569 -Protocol TCP -Action Block # Windows
What is port 4569 used for?
Port 4569 is assigned by IANA to iax (Inter-Asterisk eXchange).
Is port 4569 TCP or UDP?
Port 4569 is registered for TCP and UDP.
Is it safe to open port 4569?
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 4569 is open?
On Linux run "ss -ltnup 'sport = :4569'", on macOS "lsof -nP -i :4569", and on Windows "netstat -ano | findstr :4569" to see the local process. From another machine, "nmap -p 4569 <host>" shows whether it is reachable.