- 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 18516: HeyThings Device communicate service
Port 18516 is assigned by IANA to heythings (HeyThings Device communicate service).
18516
How heythings works
Other servicesThe client sends a request to port 18516 and the heythings service answers.
- Transport
- 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
- Other services
Is port 18516 dangerous?
We have no specific security note for port 18516. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 18516
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| heythings | 18516 | UDP | HeyThings Device communicate service | - | 2020-05-13 |
| - | 18516 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 18516, and is it reachable?
Linux
sudo ss -ltnup 'sport = :18516' # process listening on 18516
sudo lsof -nP -i :18516macOS
sudo lsof -nP -i :18516
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 18516 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 18516 netstat -ano | findstr :18516
From another machine
nmap -p 18516 -sV <host> sudo nmap -sU -p 18516 <host> nc -zv <host> 18516
Block it in the firewall
sudo ufw deny 18516/udp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 18516" -Direction Inbound -LocalPort 18516 -Protocol UDP -Action Block # Windows
What is port 18516 used for?
Port 18516 is assigned by IANA to heythings (HeyThings Device communicate service).
Is port 18516 TCP or UDP?
Port 18516 is registered for UDP.
Is it safe to open port 18516?
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 18516 is open?
On Linux run "ss -ltnup 'sport = :18516'", on macOS "lsof -nP -i :18516", and on Windows "netstat -ano | findstr :18516" to see the local process. From another machine, "nmap -p 18516 <host>" shows whether it is reachable.
Other other services ports
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