CyberHunter
Local dataset, no network
// Other services

Port 1696: rrifmm

Port 1696 is assigned by IANA to rrifmm (rrifmm).

1696

How rrifmm works

Other services
client:1696rrifmmresponse client:1696rrifmmresponse

The client sends a request to port 1696 and the rrifmm 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 1696 dangerous?

We have no specific security note for port 1696. 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 1696

ServicePortTransportDescriptionReferenceUpdated
rrifmm 1696 TCP, UDP rrifmm - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1696, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1696'      # process listening on 1696
sudo lsof -nP -i :1696

macOS

sudo lsof -nP -i :1696

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1696 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1696
netstat -ano | findstr :1696

From another machine

nmap -p 1696 -sV <host>
sudo nmap -sU -p 1696 <host>
nc -zv <host> 1696

Block it in the firewall

sudo ufw deny 1696/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1696" -Direction Inbound -LocalPort 1696 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1696 used for?

Port 1696 is assigned by IANA to rrifmm (rrifmm).

Is port 1696 TCP or UDP?

Port 1696 is registered for TCP and UDP.

Is it safe to open port 1696?

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 1696 is open?

On Linux run "ss -ltnup 'sport = :1696'", on macOS "lsof -nP -i :1696", and on Windows "netstat -ano | findstr :1696" to see the local process. From another machine, "nmap -p 1696 <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

Latest vulnerability news

All news