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// Web

Port 16993: Intel(R) AMT SOAP/HTTPS

Port 16993 is assigned by IANA to amt-soap-https (Intel(R) AMT SOAP/HTTPS).

16993

How amt-soap-https works

Web
browser:16993amt-soap-https browser:16993amt-soap-https

A browser sends an HTTP request to port 16993 and the amt-soap-https server sends the page back.

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
Web
01 Security

Is port 16993 dangerous?

We have no specific security note for port 16993. Its risk depends on the program actually listening on it. General advice for web services:

  • Serve it over HTTPS only and check the HTTP security headers.
  • Keep admin consoles and development servers off the Internet.
  • Patch the application server and remove default credentials and sample apps.
02 Registry

IANA registry entries for port 16993

ServicePortTransportDescriptionReferenceUpdated
amt-soap-https 16993 TCP, UDP Intel(R) AMT SOAP/HTTPS - 2005-02

// source: IANA service name and port number registry

03 Check it

Which program uses port 16993, and is it reachable?

Linux

sudo ss -ltnup 'sport = :16993'      # process listening on 16993
sudo lsof -nP -i :16993

macOS

sudo lsof -nP -i :16993

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 16993 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 16993
netstat -ano | findstr :16993

From another machine

nmap -p 16993 -sV <host>
sudo nmap -sU -p 16993 <host>
nc -zv <host> 16993

Block it in the firewall

sudo ufw deny 16993/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 16993" -Direction Inbound -LocalPort 16993 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 16993 used for?

Port 16993 is assigned by IANA to amt-soap-https (Intel(R) AMT SOAP/HTTPS).

Is port 16993 TCP or UDP?

Port 16993 is registered for TCP and UDP.

Is it safe to open port 16993?

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. Serve it over HTTPS only and check the HTTP security headers.

How do I check if port 16993 is open?

On Linux run "ss -ltnup 'sport = :16993'", on macOS "lsof -nP -i :16993", and on Windows "netstat -ano | findstr :16993" to see the local process. From another machine, "nmap -p 16993 <host>" shows whether it is reachable.

05 Related
:443 HTTPS tcp · udp · sctp · low risk :80 HTTP tcp · udp · sctp · moderate risk :8080 HTTP alternate tcp · udp · high risk :8443 HTTPS alternate tcp · udp · moderate risk :3000 Dev servers / Grafana tcp · udp · moderate risk :5000 Flask / Docker registry / UPnP tcp · udp · moderate risk :8000 HTTP alternate (dev) tcp · udp · moderate risk :8888 Jupyter / HTTP alternate tcp · udp · high risk

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