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// Other services

Port 3777: Jibe EdgeBurst

Port 3777 is assigned by IANA to jibe-eb (Jibe EdgeBurst).

3777

How jibe-eb works

Other services
client:3777jibe-ebresponse client:3777jibe-ebresponse

The client sends a request to port 3777 and the jibe-eb 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 3777 dangerous?

We have no specific security note for port 3777. 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 3777

ServicePortTransportDescriptionReferenceUpdated
jibe-eb 3777 TCP, UDP Jibe EdgeBurst - 2003-06

// source: IANA service name and port number registry

03 Check it

Which program uses port 3777, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3777'      # process listening on 3777
sudo lsof -nP -i :3777

macOS

sudo lsof -nP -i :3777

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3777 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3777
netstat -ano | findstr :3777

From another machine

nmap -p 3777 -sV <host>
sudo nmap -sU -p 3777 <host>
nc -zv <host> 3777

Block it in the firewall

sudo ufw deny 3777/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3777" -Direction Inbound -LocalPort 3777 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3777 used for?

Port 3777 is assigned by IANA to jibe-eb (Jibe EdgeBurst).

Is port 3777 TCP or UDP?

Port 3777 is registered for TCP and UDP.

Is it safe to open port 3777?

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 3777 is open?

On Linux run "ss -ltnup 'sport = :3777'", on macOS "lsof -nP -i :3777", and on Windows "netstat -ano | findstr :3777" to see the local process. From another machine, "nmap -p 3777 <host>" shows whether it is reachable.

05 Related
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