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// Other services

Port 1477: ms-sna-server

Port 1477 is assigned by IANA to ms-sna-server (ms-sna-server).

1477

How ms-sna-server works

Other services
client:1477ms-sna-serverresponse client:1477ms-sna-serverresponse

The client sends a request to port 1477 and the ms-sna-server service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 1477 dangerous?

We have no specific security note for port 1477. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 1477

ServicePortTransportDescriptionReferenceUpdated
ms-sna-server 1477 TCP, UDP ms-sna-server - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1477, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1477'      # process listening on 1477
sudo lsof -nP -i :1477

macOS

sudo lsof -nP -i :1477

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1477 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1477
netstat -ano | findstr :1477

From another machine

nmap -p 1477 -sV <host>
sudo nmap -sU -p 1477 <host>
nc -zv <host> 1477

Block it in the firewall

sudo ufw deny 1477/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1477" -Direction Inbound -LocalPort 1477 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1477 used for?

Port 1477 is assigned by IANA to ms-sna-server (ms-sna-server).

Is port 1477 TCP or UDP?

Port 1477 is registered for TCP and UDP.

Is it safe to open port 1477?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 1477 is open?

On Linux run "ss -ltnup 'sport = :1477'", on macOS "lsof -nP -i :1477", and on Windows "netstat -ano | findstr :1477" to see the local process. From another machine, "nmap -p 1477 <host>" shows whether it is reachable.

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