CyberHunter
Local dataset, no network
// Other services

Port 8763: MC-APPSERVER

Port 8763 is assigned by IANA to mc-appserver (MC-APPSERVER).

8763

How mc-appserver works

Other services
client:8763mc-appserverresponse client:8763mc-appserverresponse

The client sends a request to port 8763 and the mc-appserver 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 8763 dangerous?

We have no specific security note for port 8763. 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 8763

ServicePortTransportDescriptionReferenceUpdated
mc-appserver 8763 TCP, UDP MC-APPSERVER - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 8763, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8763'      # process listening on 8763
sudo lsof -nP -i :8763

macOS

sudo lsof -nP -i :8763

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8763 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8763
netstat -ano | findstr :8763

From another machine

nmap -p 8763 -sV <host>
sudo nmap -sU -p 8763 <host>
nc -zv <host> 8763

Block it in the firewall

sudo ufw deny 8763/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8763" -Direction Inbound -LocalPort 8763 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 8763 used for?

Port 8763 is assigned by IANA to mc-appserver (MC-APPSERVER).

Is port 8763 TCP or UDP?

Port 8763 is registered for TCP and UDP.

Is it safe to open port 8763?

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 8763 is open?

On Linux run "ss -ltnup 'sport = :8763'", on macOS "lsof -nP -i :8763", and on Windows "netstat -ano | findstr :8763" to see the local process. From another machine, "nmap -p 8763 <host>" shows whether it is reachable.

05 Related
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