Port 271

pt-tls · TCP/UDP

RangeSystem/well-known port (0–1023)
ProtocolTCP/UDP
Servicept-tls
ReferenceRFC 6876
Registered2012-07-31

Frequently asked questions

What is port 271 used for?

Port 271 is registered with the IANA for pt-tls (TCP/UDP). Description: IETF Network Endpoint Assessment (NEA) Posture Transport Protocol over TLS (PT-TLS); Reserved.

Is port 271 a well-known port?

Yes. Port 271 is in the range 0–1023 (system or well-known ports). On Linux and macOS only privileged processes may bind to these ports.

How do I check whether port 271 is open?

Locally on Linux with ss -tulpn | grep ':271\b', on Windows with netstat -ano | findstr :271. To test a remote host use Test-NetConnection <host> -Port 271 in PowerShell or nc -zv <host> 271 on Linux/macOS.

How do I open port 271 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 271/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=271/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 271" -Direction Inbound -Protocol TCP -LocalPort 271 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPpt-tlsIETF Network Endpoint Assessment (NEA) Posture Transport Protocol over TLS (PT-TLS)
UDP–Reserved

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