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// Network services

Port 9005: Golem Inter-System RPC

Port 9005 is assigned by IANA to golem (Golem Inter-System RPC).

9005

How golem works

Network services
client:9005golemresponse client:9005golemresponse

The client sends a request to port 9005 and the golem 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
Network services
01 Security

Is port 9005 dangerous?

We have no specific security note for port 9005. Its risk depends on the program actually listening on it. General advice for network services services:

  • Answer only the networks that need the service (no open resolvers, relays or reflectors).
  • UDP services can be abused for DDoS amplification: rate-limit or block them at the edge.
  • Disable legacy test services that have no use in production.
02 Registry

IANA registry entries for port 9005

ServicePortTransportDescriptionReferenceUpdated
golem 9005 TCP Golem Inter-System RPC - 2015-03-09
-9005-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 9005, and is it reachable?

Linux

sudo ss -ltnup 'sport = :9005'      # process listening on 9005
sudo lsof -nP -i :9005

macOS

sudo lsof -nP -i :9005

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 9005 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 9005
netstat -ano | findstr :9005

From another machine

nmap -p 9005 -sV <host>
nc -zv <host> 9005

Block it in the firewall

sudo ufw deny 9005/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 9005" -Direction Inbound -LocalPort 9005 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 9005 used for?

Port 9005 is assigned by IANA to golem (Golem Inter-System RPC).

Is port 9005 TCP or UDP?

Port 9005 is registered for TCP.

Is it safe to open port 9005?

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. Answer only the networks that need the service (no open resolvers, relays or reflectors).

How do I check if port 9005 is open?

On Linux run "ss -ltnup 'sport = :9005'", on macOS "lsof -nP -i :9005", and on Windows "netstat -ano | findstr :9005" to see the local process. From another machine, "nmap -p 9005 <host>" shows whether it is reachable.

05 Related
:53 DNS tcp · udp · moderate risk :135 MS RPC tcp · udp · high risk :123 NTP udp · tcp · moderate risk :67 DHCP server udp · tcp · moderate risk :111 rpcbind tcp · udp · high risk :9100 Raw printing (JetDirect) tcp · udp · high risk :631 IPP / CUPS tcp · udp · high risk :5353 mDNS udp · tcp · moderate risk

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