CyberHunter
Local dataset, no network
// Other services

Port 4485: Assyst Data Repository Service

Port 4485 is assigned by IANA to assyst-dr (Assyst Data Repository Service).

4485

How assyst-dr works

Other services
client:4485assyst-drresponse client:4485assyst-drresponse

The client sends a request to port 4485 and the assyst-dr service answers.

Transport
TCP
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 4485 dangerous?

We have no specific security note for port 4485. 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 4485

ServicePortTransportDescriptionReferenceUpdated
assyst-dr 4485 TCP Assyst Data Repository Service - 2008-08-26
-4485-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 4485, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4485'      # process listening on 4485
sudo lsof -nP -i :4485

macOS

sudo lsof -nP -i :4485

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4485 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4485
netstat -ano | findstr :4485

From another machine

nmap -p 4485 -sV <host>
nc -zv <host> 4485

Block it in the firewall

sudo ufw deny 4485/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4485" -Direction Inbound -LocalPort 4485 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4485 used for?

Port 4485 is assigned by IANA to assyst-dr (Assyst Data Repository Service).

Is port 4485 TCP or UDP?

Port 4485 is registered for TCP.

Is it safe to open port 4485?

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 4485 is open?

On Linux run "ss -ltnup 'sport = :4485'", on macOS "lsof -nP -i :4485", and on Windows "netstat -ano | findstr :4485" to see the local process. From another machine, "nmap -p 4485 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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