CyberHunter
Local dataset, no network
// Network services

Port 5474: The Apsolab company's status query protocol

Port 5474 is assigned by IANA to apsolab-rpc (The Apsolab company's status query protocol).

5474

How apsolab-rpc works

Network services
client:5474apsolab-rpcresponse client:5474apsolab-rpcresponse

The client sends a request to port 5474 and the apsolab-rpc service answers.

Transport
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
Network services
01 Security

Is port 5474 dangerous?

We have no specific security note for port 5474. 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 5474

ServicePortTransportDescriptionReferenceUpdated
apsolab-rpc 5474 UDP The Apsolab company's status query protocol - 2014-11-10
-5474-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 5474, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5474'      # process listening on 5474
sudo lsof -nP -i :5474

macOS

sudo lsof -nP -i :5474

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5474 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5474
netstat -ano | findstr :5474

From another machine

nmap -p 5474 -sV <host>
sudo nmap -sU -p 5474 <host>
nc -zv <host> 5474

Block it in the firewall

sudo ufw deny 5474/udp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5474" -Direction Inbound -LocalPort 5474 -Protocol UDP -Action Block  # Windows
04 FAQ
What is port 5474 used for?

Port 5474 is assigned by IANA to apsolab-rpc (The Apsolab company's status query protocol).

Is port 5474 TCP or UDP?

Port 5474 is registered for UDP.

Is it safe to open port 5474?

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 5474 is open?

On Linux run "ss -ltnup 'sport = :5474'", on macOS "lsof -nP -i :5474", and on Windows "netstat -ano | findstr :5474" to see the local process. From another machine, "nmap -p 5474 <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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