HTTPfy

Port 16993 (amt-soap-https)

IANA assigns port 16993 to amt-soap-https: Intel(R) AMT SOAP/HTTPS.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
amt-soap-https TCP Intel(R) AMT SOAP/HTTPS David T Hines -
amt-soap-https UDP Intel(R) AMT SOAP/HTTPS David T Hines -

Registry dates for this port: registered 2005-02.

Check what is listening on port 16993

Linux: is anything listening on TCP 16993?
sudo ss -tlnp 'sport = :16993'
Linux: UDP 16993
sudo ss -ulnp 'sport = :16993'
Linux / macOS: which process owns the port
sudo lsof -nP -i :16993
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':16993 '
Windows (Command Prompt)
netstat -ano | findstr :16993
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 16993 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 16993
From Windows
Test-NetConnection HOST -Port 16993
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 16993

Block port 16993 in the firewall

ufw
sudo ufw deny 16993/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 16993 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 16993 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 16993' -Direction Inbound -Protocol TCP -LocalPort 16993 -Action Block
ufw
sudo ufw deny 16993/udp
iptables
sudo iptables -A INPUT -p udp --dport 16993 -j DROP
nftables
sudo nft add rule inet filter input udp dport 16993 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 16993' -Direction Inbound -Protocol UDP -LocalPort 16993 -Action Block

Related ports

16991intel-rci-mp16992amt-soap-http16994amt-redir-tcp16995amt-redir-tls

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.