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// Other services

Port 7001: callbacks to cache managers

Port 7001 is assigned by IANA to afs3-callback (callbacks to cache managers).

7001

How afs3-callback works

Other services
client:7001afs3-callbackresponse client:7001afs3-callbackresponse

The client sends a request to port 7001 and the afs3-callback 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 7001 dangerous?

We have no specific security note for port 7001. 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 7001

ServicePortTransportDescriptionReferenceUpdated
afs3-callback 7001 TCP, UDP callbacks to cache managers
Reported: Known Unauthorized Use on port 7001
 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 7001, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7001'      # process listening on 7001
sudo lsof -nP -i :7001

macOS

sudo lsof -nP -i :7001

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7001 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7001
netstat -ano | findstr :7001

From another machine

nmap -p 7001 -sV <host>
sudo nmap -sU -p 7001 <host>
nc -zv <host> 7001

Block it in the firewall

sudo ufw deny 7001/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7001" -Direction Inbound -LocalPort 7001 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7001 used for?

Port 7001 is assigned by IANA to afs3-callback (callbacks to cache managers).

Is port 7001 TCP or UDP?

Port 7001 is registered for TCP and UDP.

Is it safe to open port 7001?

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 7001 is open?

On Linux run "ss -ltnup 'sport = :7001'", on macOS "lsof -nP -i :7001", and on Windows "netstat -ano | findstr :7001" to see the local process. From another machine, "nmap -p 7001 <host>" shows whether it is reachable.

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