Port 20048

mountd · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicemountd
Registered2010-08-09

Frequently asked questions

What is port 20048 used for?

Port 20048 is registered with the IANA for mountd (TCP/UDP). Description: NFS mount protocol.

Is port 20048 a well-known port?

No. Port 20048 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 20048 is open?

Locally on Linux with ss -tulpn | grep ':20048\b', on Windows with netstat -ano | findstr :20048. To test a remote host use Test-NetConnection <host> -Port 20048 in PowerShell or nc -zv <host> 20048 on Linux/macOS.

How do I open port 20048 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 20048/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=20048/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 20048" -Direction Inbound -Protocol TCP -LocalPort 20048 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPmountdNFS mount protocol
UDPmountdNFS mount protocol

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