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// Other services

Port 2056: OmniSky Port

Port 2056 is assigned by IANA to omnisky (OmniSky Port).

2056

How omnisky works

Other services
client:2056omniskyresponse client:2056omniskyresponse

The client sends a request to port 2056 and the omnisky 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 2056 dangerous?

We have no specific security note for port 2056. 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 2056

ServicePortTransportDescriptionReferenceUpdated
omnisky 2056 TCP, UDP OmniSky Port - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2056, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2056'      # process listening on 2056
sudo lsof -nP -i :2056

macOS

sudo lsof -nP -i :2056

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2056 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2056
netstat -ano | findstr :2056

From another machine

nmap -p 2056 -sV <host>
sudo nmap -sU -p 2056 <host>
nc -zv <host> 2056

Block it in the firewall

sudo ufw deny 2056/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2056" -Direction Inbound -LocalPort 2056 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2056 used for?

Port 2056 is assigned by IANA to omnisky (OmniSky Port).

Is port 2056 TCP or UDP?

Port 2056 is registered for TCP and UDP.

Is it safe to open port 2056?

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 2056 is open?

On Linux run "ss -ltnup 'sport = :2056'", on macOS "lsof -nP -i :2056", and on Windows "netstat -ano | findstr :2056" to see the local process. From another machine, "nmap -p 2056 <host>" shows whether it is reachable.

05 Related
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