Port 4740

ipfixs · SCTP/TCP/UDP

RangeRegistered port (1024–49151)
ProtocolSCTP/TCP/UDP
Serviceipfixs
Registered2006-10

Frequently asked questions

What is port 4740 used for?

Port 4740 is registered with the IANA for ipfixs (SCTP/TCP/UDP). Description: ipfix protocol over TLS; ipfix protocol over DTLS.

Is port 4740 a well-known port?

No. Port 4740 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 4740 is open?

Locally on Linux with ss -tulpn | grep ':4740\b', on Windows with netstat -ano | findstr :4740. To test a remote host use Test-NetConnection <host> -Port 4740 in PowerShell or nc -zv <host> 4740 on Linux/macOS.

How do I open port 4740 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 4740/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4740/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4740" -Direction Inbound -Protocol TCP -LocalPort 4740 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPipfixsipfix protocol over TLS
SCTPipfixsipfix protocol over DTLS
UDPipfixsipfix protocol over DTLS

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