CyberHunter
Local dataset, no network
// Other services

Port 7800: Apple Software Restore

Port 7800 is assigned by IANA to asr (Apple Software Restore).

7800

How asr works

Other services
client:7800asrresponse client:7800asrresponse

The client sends a request to port 7800 and the asr 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 7800 dangerous?

We have no specific security note for port 7800. 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 7800

ServicePortTransportDescriptionReferenceUpdated
asr 7800 TCP, UDP Apple Software Restore - 2006-01

// source: IANA service name and port number registry

03 Check it

Which program uses port 7800, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7800'      # process listening on 7800
sudo lsof -nP -i :7800

macOS

sudo lsof -nP -i :7800

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7800 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7800
netstat -ano | findstr :7800

From another machine

nmap -p 7800 -sV <host>
sudo nmap -sU -p 7800 <host>
nc -zv <host> 7800

Block it in the firewall

sudo ufw deny 7800/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7800" -Direction Inbound -LocalPort 7800 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7800 used for?

Port 7800 is assigned by IANA to asr (Apple Software Restore).

Is port 7800 TCP or UDP?

Port 7800 is registered for TCP and UDP.

Is it safe to open port 7800?

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 7800 is open?

On Linux run "ss -ltnup 'sport = :7800'", on macOS "lsof -nP -i :7800", and on Windows "netstat -ano | findstr :7800" to see the local process. From another machine, "nmap -p 7800 <host>" shows whether it is reachable.

05 Related
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