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// Other services

Port 3982: ESRI Image Server

Port 3982 is assigned by IANA to eis (ESRI Image Server).

3982

How eis works

Other services
client:3982eisresponse client:3982eisresponse

The client sends a request to port 3982 and the eis 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 3982 dangerous?

We have no specific security note for port 3982. 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 3982

ServicePortTransportDescriptionReferenceUpdated
eis 3982 TCP, UDP ESRI Image Server - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3982, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3982'      # process listening on 3982
sudo lsof -nP -i :3982

macOS

sudo lsof -nP -i :3982

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3982 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3982
netstat -ano | findstr :3982

From another machine

nmap -p 3982 -sV <host>
sudo nmap -sU -p 3982 <host>
nc -zv <host> 3982

Block it in the firewall

sudo ufw deny 3982/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3982" -Direction Inbound -LocalPort 3982 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3982 used for?

Port 3982 is assigned by IANA to eis (ESRI Image Server).

Is port 3982 TCP or UDP?

Port 3982 is registered for TCP and UDP.

Is it safe to open port 3982?

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 3982 is open?

On Linux run "ss -ltnup 'sport = :3982'", on macOS "lsof -nP -i :3982", and on Windows "netstat -ano | findstr :3982" to see the local process. From another machine, "nmap -p 3982 <host>" shows whether it is reachable.

05 Related
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