Port 4691

mtn · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicemtn
Registered2010-12-22

Frequently asked questions

What is port 4691 used for?

Port 4691 is registered with the IANA for mtn (TCP/UDP). Description: monotone Netsync Protocol.

Is port 4691 a well-known port?

No. Port 4691 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 4691 is open?

Locally on Linux with ss -tulpn | grep ':4691\b', on Windows with netstat -ano | findstr :4691. To test a remote host use Test-NetConnection <host> -Port 4691 in PowerShell or nc -zv <host> 4691 on Linux/macOS.

How do I open port 4691 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 4691/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4691/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4691" -Direction Inbound -Protocol TCP -LocalPort 4691 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPmtnmonotone Netsync Protocol
UDPmtnmonotone Netsync Protocol

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