CyberHunter
Local dataset, no network
// Other services

Port 2779: LBC Sync

Port 2779 is assigned by IANA to lbc-sync (LBC Sync).

2779

How lbc-sync works

Other services
client:2779lbc-syncresponse client:2779lbc-syncresponse

The client sends a request to port 2779 and the lbc-sync 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 2779 dangerous?

We have no specific security note for port 2779. 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 2779

ServicePortTransportDescriptionReferenceUpdated
lbc-sync 2779 TCP, UDP LBC Sync - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2779, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2779'      # process listening on 2779
sudo lsof -nP -i :2779

macOS

sudo lsof -nP -i :2779

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2779 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2779
netstat -ano | findstr :2779

From another machine

nmap -p 2779 -sV <host>
sudo nmap -sU -p 2779 <host>
nc -zv <host> 2779

Block it in the firewall

sudo ufw deny 2779/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2779" -Direction Inbound -LocalPort 2779 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2779 used for?

Port 2779 is assigned by IANA to lbc-sync (LBC Sync).

Is port 2779 TCP or UDP?

Port 2779 is registered for TCP and UDP.

Is it safe to open port 2779?

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 2779 is open?

On Linux run "ss -ltnup 'sport = :2779'", on macOS "lsof -nP -i :2779", and on Windows "netstat -ano | findstr :2779" to see the local process. From another machine, "nmap -p 2779 <host>" shows whether it is reachable.

05 Related
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