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// Other services

Port 699: Access Network

Port 699 is assigned by IANA to accessnetwork (Access Network).

699

How accessnetwork works

Other services
client:699accessnetworkresponse client:699accessnetworkresponse

The client sends a request to port 699 and the accessnetwork 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 699 dangerous?

We have no specific security note for port 699. 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 699

ServicePortTransportDescriptionReferenceUpdated
accessnetwork 699 TCP, UDP Access Network - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 699, and is it reachable?

Linux

sudo ss -ltnup 'sport = :699'      # process listening on 699
sudo lsof -nP -i :699

macOS

sudo lsof -nP -i :699

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 699 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 699
netstat -ano | findstr :699

From another machine

nmap -p 699 -sV <host>
sudo nmap -sU -p 699 <host>
nc -zv <host> 699

Block it in the firewall

sudo ufw deny 699/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 699" -Direction Inbound -LocalPort 699 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 699 used for?

Port 699 is assigned by IANA to accessnetwork (Access Network).

Is port 699 TCP or UDP?

Port 699 is registered for TCP and UDP.

Is it safe to open port 699?

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 699 is open?

On Linux run "ss -ltnup 'sport = :699'", on macOS "lsof -nP -i :699", and on Windows "netstat -ano | findstr :699" to see the local process. From another machine, "nmap -p 699 <host>" shows whether it is reachable.

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