Port 1022

exp2 · DCCP/SCTP/TCP/UDP

RangeSystem/well-known port (0–1023)
ProtocolDCCP/SCTP/TCP/UDP
Serviceexp2
Reference1, RFC 4727, RFC 6335

Frequently asked questions

What is port 1022 used for?

Port 1022 is registered with the IANA for exp2 (DCCP/SCTP/TCP/UDP). Description: RFC3692-style Experiment 2.

Is port 1022 a well-known port?

Yes. Port 1022 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 1022 is open?

Locally on Linux with ss -tulpn | grep ':1022\b', on Windows with netstat -ano | findstr :1022. To test a remote host use Test-NetConnection <host> -Port 1022 in PowerShell or nc -zv <host> 1022 on Linux/macOS.

How do I open port 1022 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 1022/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=1022/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 1022" -Direction Inbound -Protocol TCP -LocalPort 1022 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPexp2RFC3692-style Experiment 2
UDPexp2RFC3692-style Experiment 2
SCTPexp2RFC3692-style Experiment 2
DCCPexp2RFC3692-style Experiment 2

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