Port 355

datex-asn · TCP/UDP

RangeSystem/well-known port (0–1023)
ProtocolTCP/UDP
Servicedatex-asn

Frequently asked questions

What is port 355 used for?

Port 355 is registered with the IANA for datex-asn (TCP/UDP). Description: DATEX-ASN.

Is port 355 a well-known port?

Yes. Port 355 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 355 is open?

Locally on Linux with ss -tulpn | grep ':355\b', on Windows with netstat -ano | findstr :355. To test a remote host use Test-NetConnection <host> -Port 355 in PowerShell or nc -zv <host> 355 on Linux/macOS.

How do I open port 355 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 355/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=355/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 355" -Direction Inbound -Protocol TCP -LocalPort 355 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPdatex-asnDATEX-ASN
UDPdatex-asnDATEX-ASN

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