CyberHunter
Local dataset, no network
// Other services

Port 3983: ESRI Image Service

Port 3983 is assigned by IANA to eisp (ESRI Image Service).

3983

How eisp works

Other services
client:3983eispresponse client:3983eispresponse

The client sends a request to port 3983 and the eisp 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 3983 dangerous?

We have no specific security note for port 3983. 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 3983

ServicePortTransportDescriptionReferenceUpdated
eisp 3983 TCP, UDP ESRI Image Service - 2006-07

// source: IANA service name and port number registry

03 Check it

Which program uses port 3983, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3983'      # process listening on 3983
sudo lsof -nP -i :3983

macOS

sudo lsof -nP -i :3983

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3983 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3983
netstat -ano | findstr :3983

From another machine

nmap -p 3983 -sV <host>
sudo nmap -sU -p 3983 <host>
nc -zv <host> 3983

Block it in the firewall

sudo ufw deny 3983/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3983" -Direction Inbound -LocalPort 3983 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3983 used for?

Port 3983 is assigned by IANA to eisp (ESRI Image Service).

Is port 3983 TCP or UDP?

Port 3983 is registered for TCP and UDP.

Is it safe to open port 3983?

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 3983 is open?

On Linux run "ss -ltnup 'sport = :3983'", on macOS "lsof -nP -i :3983", and on Windows "netstat -ano | findstr :3983" to see the local process. From another machine, "nmap -p 3983 <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

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