- Close the port if nothing on the host needs it.
- Identify the process that listens on it (commands below) before opening it in a firewall.
- Expose a service only to the networks that use it.
Port 8502: FTN Message Transfer Protocol
Port 8502 is assigned by IANA to ftnmtp (FTN Message Transfer Protocol).
8502
How ftnmtp works
Other servicesThe client sends a request to port 8502 and the ftnmtp service answers.
- Transport
- TCP
- 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
- Other services
Is port 8502 dangerous?
We have no specific security note for port 8502. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 8502
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| ftnmtp | 8502 | TCP | FTN Message Transfer Protocol | - | 2014-01-07 |
| - | 8502 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 8502, and is it reachable?
Linux
sudo ss -ltnup 'sport = :8502' # process listening on 8502
sudo lsof -nP -i :8502macOS
sudo lsof -nP -i :8502
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 8502 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 8502 netstat -ano | findstr :8502
From another machine
nmap -p 8502 -sV <host> nc -zv <host> 8502
Block it in the firewall
sudo ufw deny 8502/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 8502" -Direction Inbound -LocalPort 8502 -Protocol TCP -Action Block # Windows
What is port 8502 used for?
Port 8502 is assigned by IANA to ftnmtp (FTN Message Transfer Protocol).
Is port 8502 TCP or UDP?
Port 8502 is registered for TCP.
Is it safe to open port 8502?
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. Close the port if nothing on the host needs it.
How do I check if port 8502 is open?
On Linux run "ss -ltnup 'sport = :8502'", on macOS "lsof -nP -i :8502", and on Windows "netstat -ano | findstr :8502" to see the local process. From another machine, "nmap -p 8502 <host>" shows whether it is reachable.
Other other services ports
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