CyberHunter
Local dataset, no network
// Other services

Port 606: Cray Unified Resource Manager

Port 606 is assigned by IANA to urm (Cray Unified Resource Manager).

606

How urm works

Other services
client:606urmresponse client:606urmresponse

The client sends a request to port 606 and the urm 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 606 dangerous?

We have no specific security note for port 606. 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 606

ServicePortTransportDescriptionReferenceUpdated
urm 606 TCP, UDP Cray Unified Resource Manager - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 606, and is it reachable?

Linux

sudo ss -ltnup 'sport = :606'      # process listening on 606
sudo lsof -nP -i :606

macOS

sudo lsof -nP -i :606

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 606 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 606
netstat -ano | findstr :606

From another machine

nmap -p 606 -sV <host>
sudo nmap -sU -p 606 <host>
nc -zv <host> 606

Block it in the firewall

sudo ufw deny 606/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 606" -Direction Inbound -LocalPort 606 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 606 used for?

Port 606 is assigned by IANA to urm (Cray Unified Resource Manager).

Is port 606 TCP or UDP?

Port 606 is registered for TCP and UDP.

Is it safe to open port 606?

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 606 is open?

On Linux run "ss -ltnup 'sport = :606'", on macOS "lsof -nP -i :606", and on Windows "netstat -ano | findstr :606" to see the local process. From another machine, "nmap -p 606 <host>" shows whether it is reachable.

05 Related
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