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// Other services

Port 1684: SnareSecure

Port 1684 is assigned by IANA to snaresecure (SnareSecure).

1684

How snaresecure works

Other services
client:1684snaresecureresponse client:1684snaresecureresponse

The client sends a request to port 1684 and the snaresecure 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 1684 dangerous?

We have no specific security note for port 1684. 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 1684

ServicePortTransportDescriptionReferenceUpdated
snaresecure 1684 TCP, UDP SnareSecure - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1684, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1684'      # process listening on 1684
sudo lsof -nP -i :1684

macOS

sudo lsof -nP -i :1684

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1684 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1684
netstat -ano | findstr :1684

From another machine

nmap -p 1684 -sV <host>
sudo nmap -sU -p 1684 <host>
nc -zv <host> 1684

Block it in the firewall

sudo ufw deny 1684/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1684" -Direction Inbound -LocalPort 1684 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1684 used for?

Port 1684 is assigned by IANA to snaresecure (SnareSecure).

Is port 1684 TCP or UDP?

Port 1684 is registered for TCP and UDP.

Is it safe to open port 1684?

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 1684 is open?

On Linux run "ss -ltnup 'sport = :1684'", on macOS "lsof -nP -i :1684", and on Windows "netstat -ano | findstr :1684" to see the local process. From another machine, "nmap -p 1684 <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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