Port 58
xns-mail · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | xns-mail |
Frequently asked questions
What is port 58 used for?
Port 58 is registered with the IANA for xns-mail (TCP/UDP). Description: XNS Mail.
Is port 58 a well-known port?
Yes. Port 58 is in the range 0–1023 (system or well-known ports). On Linux and macOS only privileged processes may bind to these ports.
How do I check whether port 58 is open?
Locally on Linux with ss -tulpn | grep ':58\b', on Windows with netstat -ano | findstr :58. To test a remote host use Test-NetConnection <host> -Port 58 in PowerShell or nc -zv <host> 58 on Linux/macOS.
How do I open port 58 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 58/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=58/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 58" -Direction Inbound -Protocol TCP -LocalPort 58 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | xns-mail | XNS Mail |
| UDP | xns-mail | XNS Mail |