Port 4754

gre-in-udp · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicegre-in-udp
ReferenceRFC 8086
Registered2016-10-05

Frequently asked questions

What is port 4754 used for?

Port 4754 is registered with the IANA for gre-in-udp (TCP/UDP). Description: Reserved; GRE-in-UDP Encapsulation.

Is port 4754 a well-known port?

No. Port 4754 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 4754 is open?

Locally on Linux with ss -tulpn | grep ':4754\b', on Windows with netstat -ano | findstr :4754. To test a remote host use Test-NetConnection <host> -Port 4754 in PowerShell or nc -zv <host> 4754 on Linux/macOS.

How do I open port 4754 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 4754/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4754/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4754" -Direction Inbound -Protocol TCP -LocalPort 4754 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCP–Reserved
UDPgre-in-udpGRE-in-UDP Encapsulation

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