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// Other services

Port 122: SMAKYNET

Port 122 is assigned by IANA to smakynet (SMAKYNET).

122

How smakynet works

Other services
client:122smakynetresponse client:122smakynetresponse

The client sends a request to port 122 and the smakynet 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 122 dangerous?

We have no specific security note for port 122. 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 122

ServicePortTransportDescriptionReferenceUpdated
smakynet 122 TCP, UDP SMAKYNET - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 122, and is it reachable?

Linux

sudo ss -ltnup 'sport = :122'      # process listening on 122
sudo lsof -nP -i :122

macOS

sudo lsof -nP -i :122

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 122 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 122
netstat -ano | findstr :122

From another machine

nmap -p 122 -sV <host>
sudo nmap -sU -p 122 <host>
nc -zv <host> 122

Block it in the firewall

sudo ufw deny 122/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 122" -Direction Inbound -LocalPort 122 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 122 used for?

Port 122 is assigned by IANA to smakynet (SMAKYNET).

Is port 122 TCP or UDP?

Port 122 is registered for TCP and UDP.

Is it safe to open port 122?

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 122 is open?

On Linux run "ss -ltnup 'sport = :122'", on macOS "lsof -nP -i :122", and on Windows "netstat -ano | findstr :122" to see the local process. From another machine, "nmap -p 122 <host>" shows whether it is reachable.

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