Port 8502
ftnmtp · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | ftnmtp |
| Registered | 2014-01-07 |
Frequently asked questions
What is port 8502 used for?
Port 8502 is registered with the IANA for ftnmtp (TCP/UDP). Description: FTN Message Transfer Protocol; Reserved.
Is port 8502 a well-known port?
No. Port 8502 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 8502 is open?
Locally on Linux with ss -tulpn | grep ':8502\b', on Windows with netstat -ano | findstr :8502. To test a remote host use Test-NetConnection <host> -Port 8502 in PowerShell or nc -zv <host> 8502 on Linux/macOS.
How do I open port 8502 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 8502/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=8502/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 8502" -Direction Inbound -Protocol TCP -LocalPort 8502 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | ftnmtp | FTN Message Transfer Protocol |
| UDP | – | Reserved |