CyberHunter
Local dataset, no network
// Other services

Port 48003: Nimbus Gateway

Port 48003 is assigned by IANA to nimgtw (Nimbus Gateway).

48003

How nimgtw works

Other services
client:48003nimgtwresponse client:48003nimgtwresponse

The client sends a request to port 48003 and the nimgtw 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 48003 dangerous?

We have no specific security note for port 48003. 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 48003

ServicePortTransportDescriptionReferenceUpdated
nimgtw 48003 TCP, UDP Nimbus Gateway - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 48003, and is it reachable?

Linux

sudo ss -ltnup 'sport = :48003'      # process listening on 48003
sudo lsof -nP -i :48003

macOS

sudo lsof -nP -i :48003

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 48003 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 48003
netstat -ano | findstr :48003

From another machine

nmap -p 48003 -sV <host>
sudo nmap -sU -p 48003 <host>
nc -zv <host> 48003

Block it in the firewall

sudo ufw deny 48003/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 48003" -Direction Inbound -LocalPort 48003 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 48003 used for?

Port 48003 is assigned by IANA to nimgtw (Nimbus Gateway).

Is port 48003 TCP or UDP?

Port 48003 is registered for TCP and UDP.

Is it safe to open port 48003?

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 48003 is open?

On Linux run "ss -ltnup 'sport = :48003'", on macOS "lsof -nP -i :48003", and on Windows "netstat -ano | findstr :48003" to see the local process. From another machine, "nmap -p 48003 <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