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// Other services

Port 4050: Wide Area File Services

Port 4050 is assigned by IANA to cisco-wafs (Wide Area File Services).

4050

How cisco-wafs works

Other services
client:4050cisco-wafsresponse client:4050cisco-wafsresponse

The client sends a request to port 4050 and the cisco-wafs 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 4050 dangerous?

We have no specific security note for port 4050. 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 4050

ServicePortTransportDescriptionReferenceUpdated
cisco-wafs 4050 TCP, UDP Wide Area File Services - 2005-02

// source: IANA service name and port number registry

03 Check it

Which program uses port 4050, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4050'      # process listening on 4050
sudo lsof -nP -i :4050

macOS

sudo lsof -nP -i :4050

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4050 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4050
netstat -ano | findstr :4050

From another machine

nmap -p 4050 -sV <host>
sudo nmap -sU -p 4050 <host>
nc -zv <host> 4050

Block it in the firewall

sudo ufw deny 4050/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4050" -Direction Inbound -LocalPort 4050 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4050 used for?

Port 4050 is assigned by IANA to cisco-wafs (Wide Area File Services).

Is port 4050 TCP or UDP?

Port 4050 is registered for TCP and UDP.

Is it safe to open port 4050?

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 4050 is open?

On Linux run "ss -ltnup 'sport = :4050'", on macOS "lsof -nP -i :4050", and on Windows "netstat -ano | findstr :4050" to see the local process. From another machine, "nmap -p 4050 <host>" shows whether it is reachable.

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