CyberHunter
Local dataset, no network
// Other services

Port 2456: altav-remmgt

Port 2456 is assigned by IANA to altav-remmgt (altav-remmgt).

2456

How altav-remmgt works

Other services
client:2456altav-remmgtresponse client:2456altav-remmgtresponse

The client sends a request to port 2456 and the altav-remmgt 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 2456 dangerous?

We have no specific security note for port 2456. 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 2456

ServicePortTransportDescriptionReferenceUpdated
altav-remmgt 2456 TCP, UDP altav-remmgt - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2456, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2456'      # process listening on 2456
sudo lsof -nP -i :2456

macOS

sudo lsof -nP -i :2456

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2456 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2456
netstat -ano | findstr :2456

From another machine

nmap -p 2456 -sV <host>
sudo nmap -sU -p 2456 <host>
nc -zv <host> 2456

Block it in the firewall

sudo ufw deny 2456/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2456" -Direction Inbound -LocalPort 2456 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2456 used for?

Port 2456 is assigned by IANA to altav-remmgt (altav-remmgt).

Is port 2456 TCP or UDP?

Port 2456 is registered for TCP and UDP.

Is it safe to open port 2456?

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 2456 is open?

On Linux run "ss -ltnup 'sport = :2456'", on macOS "lsof -nP -i :2456", and on Windows "netstat -ano | findstr :2456" to see the local process. From another machine, "nmap -p 2456 <host>" shows whether it is reachable.

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