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// Other services

Port 2778: Gwen-Sonya

Port 2778 is assigned by IANA to gwen-sonya (Gwen-Sonya).

2778

How gwen-sonya works

Other services
client:2778gwen-sonyaresponse client:2778gwen-sonyaresponse

The client sends a request to port 2778 and the gwen-sonya 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 2778 dangerous?

We have no specific security note for port 2778. 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 2778

ServicePortTransportDescriptionReferenceUpdated
gwen-sonya 2778 TCP, UDP Gwen-Sonya - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2778, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2778'      # process listening on 2778
sudo lsof -nP -i :2778

macOS

sudo lsof -nP -i :2778

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2778 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2778
netstat -ano | findstr :2778

From another machine

nmap -p 2778 -sV <host>
sudo nmap -sU -p 2778 <host>
nc -zv <host> 2778

Block it in the firewall

sudo ufw deny 2778/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2778" -Direction Inbound -LocalPort 2778 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2778 used for?

Port 2778 is assigned by IANA to gwen-sonya (Gwen-Sonya).

Is port 2778 TCP or UDP?

Port 2778 is registered for TCP and UDP.

Is it safe to open port 2778?

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 2778 is open?

On Linux run "ss -ltnup 'sport = :2778'", on macOS "lsof -nP -i :2778", and on Windows "netstat -ano | findstr :2778" to see the local process. From another machine, "nmap -p 2778 <host>" shows whether it is reachable.

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