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// Other services

Port 2637: Import Document Service

Port 2637 is assigned by IANA to imdocsvc (Import Document Service).

2637

How imdocsvc works

Other services
client:2637imdocsvcresponse client:2637imdocsvcresponse

The client sends a request to port 2637 and the imdocsvc 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 2637 dangerous?

We have no specific security note for port 2637. 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 2637

ServicePortTransportDescriptionReferenceUpdated
imdocsvc 2637 TCP, UDP Import Document Service - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2637, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2637'      # process listening on 2637
sudo lsof -nP -i :2637

macOS

sudo lsof -nP -i :2637

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2637 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2637
netstat -ano | findstr :2637

From another machine

nmap -p 2637 -sV <host>
sudo nmap -sU -p 2637 <host>
nc -zv <host> 2637

Block it in the firewall

sudo ufw deny 2637/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2637" -Direction Inbound -LocalPort 2637 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2637 used for?

Port 2637 is assigned by IANA to imdocsvc (Import Document Service).

Is port 2637 TCP or UDP?

Port 2637 is registered for TCP and UDP.

Is it safe to open port 2637?

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 2637 is open?

On Linux run "ss -ltnup 'sport = :2637'", on macOS "lsof -nP -i :2637", and on Windows "netstat -ano | findstr :2637" to see the local process. From another machine, "nmap -p 2637 <host>" shows whether it is reachable.

05 Related
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