CyberHunter
Local dataset, no network
// Other services

Port 5905: Adv Surface Mvmnt and Guidance Cont Sys

Port 5905 is assigned by IANA to asmgcs (Adv Surface Mvmnt and Guidance Cont Sys).

5905

How asmgcs works

Other services
client:5905asmgcsresponse client:5905asmgcsresponse

The client sends a request to port 5905 and the asmgcs service answers.

Transport
TCP · UDP · SCTP
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 5905 dangerous?

We have no specific security note for port 5905. 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 5905

ServicePortTransportDescriptionReferenceUpdated
asmgcs 5905 TCP, UDP, SCTP Adv Surface Mvmnt and Guidance Cont Sys - 2022-06-03

// source: IANA service name and port number registry

03 Check it

Which program uses port 5905, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5905'      # process listening on 5905
sudo lsof -nP -i :5905

macOS

sudo lsof -nP -i :5905

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5905 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5905
netstat -ano | findstr :5905

From another machine

nmap -p 5905 -sV <host>
sudo nmap -sU -p 5905 <host>
nc -zv <host> 5905

Block it in the firewall

sudo ufw deny 5905/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5905" -Direction Inbound -LocalPort 5905 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5905 used for?

Port 5905 is assigned by IANA to asmgcs (Adv Surface Mvmnt and Guidance Cont Sys).

Is port 5905 TCP or UDP?

Port 5905 is registered for TCP and UDP and SCTP.

Is it safe to open port 5905?

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 5905 is open?

On Linux run "ss -ltnup 'sport = :5905'", on macOS "lsof -nP -i :5905", and on Windows "netstat -ano | findstr :5905" to see the local process. From another machine, "nmap -p 5905 <host>" shows whether it is reachable.

05 Related
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