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// Other services

Port 3744: SASG

Port 3744 is assigned by IANA to sasg (SASG).

3744

How sasg works

Other services
client:3744sasgresponse client:3744sasgresponse

The client sends a request to port 3744 and the sasg 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 3744 dangerous?

We have no specific security note for port 3744. 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 3744

ServicePortTransportDescriptionReferenceUpdated
sasg 3744 TCP, UDP SASG - 2003-04

// source: IANA service name and port number registry

03 Check it

Which program uses port 3744, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3744'      # process listening on 3744
sudo lsof -nP -i :3744

macOS

sudo lsof -nP -i :3744

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3744 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3744
netstat -ano | findstr :3744

From another machine

nmap -p 3744 -sV <host>
sudo nmap -sU -p 3744 <host>
nc -zv <host> 3744

Block it in the firewall

sudo ufw deny 3744/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3744" -Direction Inbound -LocalPort 3744 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3744 used for?

Port 3744 is assigned by IANA to sasg (SASG).

Is port 3744 TCP or UDP?

Port 3744 is registered for TCP and UDP.

Is it safe to open port 3744?

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 3744 is open?

On Linux run "ss -ltnup 'sport = :3744'", on macOS "lsof -nP -i :3744", and on Windows "netstat -ano | findstr :3744" to see the local process. From another machine, "nmap -p 3744 <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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