CyberHunter
Local dataset, no network
// Other services

Port 4885: ABBS

Port 4885 is assigned by IANA to abbs (ABBS).

4885

How abbs works

Other services
client:4885abbsresponse client:4885abbsresponse

The client sends a request to port 4885 and the abbs 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 4885 dangerous?

We have no specific security note for port 4885. 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 4885

ServicePortTransportDescriptionReferenceUpdated
abbs 4885 TCP, UDP ABBS - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 4885, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4885'      # process listening on 4885
sudo lsof -nP -i :4885

macOS

sudo lsof -nP -i :4885

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4885 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4885
netstat -ano | findstr :4885

From another machine

nmap -p 4885 -sV <host>
sudo nmap -sU -p 4885 <host>
nc -zv <host> 4885

Block it in the firewall

sudo ufw deny 4885/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4885" -Direction Inbound -LocalPort 4885 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4885 used for?

Port 4885 is assigned by IANA to abbs (ABBS).

Is port 4885 TCP or UDP?

Port 4885 is registered for TCP and UDP.

Is it safe to open port 4885?

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 4885 is open?

On Linux run "ss -ltnup 'sport = :4885'", on macOS "lsof -nP -i :4885", and on Windows "netstat -ano | findstr :4885" to see the local process. From another machine, "nmap -p 4885 <host>" shows whether it is reachable.

05 Related
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