CyberHunter
LinkedIn profile - Bastien Cordier Email: contact@bastiencordier.pro
// Other services

Port 1928: Expnd Maui Srvr Dscovr

Port 1928 is assigned by IANA to emsd-port (Expnd Maui Srvr Dscovr).

1928

How emsd-port works

Other services
client:1928emsd-portresponse client:1928emsd-portresponse

The client sends a request to port 1928 and the emsd-port 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
Registered (1024-49151)
Category
Other services
01 Security

Is port 1928 dangerous?

We have no specific security note for port 1928. 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 1928

ServicePortTransportDescriptionReferenceUpdated
emsd-port 1928 TCP, UDP Expnd Maui Srvr Dscovr - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1928, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1928'      # process listening on 1928
sudo lsof -nP -i :1928

macOS

sudo lsof -nP -i :1928

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1928 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1928
netstat -ano | findstr :1928

From another machine

nmap -p 1928 -sV <host>
sudo nmap -sU -p 1928 <host>
nc -zv <host> 1928

Block it in the firewall

sudo ufw deny 1928/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1928" -Direction Inbound -LocalPort 1928 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1928 used for?

Port 1928 is assigned by IANA to emsd-port (Expnd Maui Srvr Dscovr).

Is port 1928 TCP or UDP?

Port 1928 is registered for TCP and UDP.

Is it safe to open port 1928?

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 1928 is open?

On Linux run "ss -ltnup 'sport = :1928'", on macOS "lsof -nP -i :1928", and on Windows "netstat -ano | findstr :1928" to see the local process. From another machine, "nmap -p 1928 <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

Latest vulnerability news

All news