CyberHunter
Local dataset, no network
// Other services

Port 3238: appareNet Analysis Server

Port 3238 is assigned by IANA to apparenet-as (appareNet Analysis Server).

3238

How apparenet-as works

Other services
client:3238apparenet-asresponse client:3238apparenet-asresponse

The client sends a request to port 3238 and the apparenet-as 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 3238 dangerous?

We have no specific security note for port 3238. 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 3238

ServicePortTransportDescriptionReferenceUpdated
apparenet-as 3238 TCP, UDP appareNet Analysis Server - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3238, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3238'      # process listening on 3238
sudo lsof -nP -i :3238

macOS

sudo lsof -nP -i :3238

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3238 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3238
netstat -ano | findstr :3238

From another machine

nmap -p 3238 -sV <host>
sudo nmap -sU -p 3238 <host>
nc -zv <host> 3238

Block it in the firewall

sudo ufw deny 3238/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3238" -Direction Inbound -LocalPort 3238 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3238 used for?

Port 3238 is assigned by IANA to apparenet-as (appareNet Analysis Server).

Is port 3238 TCP or UDP?

Port 3238 is registered for TCP and UDP.

Is it safe to open port 3238?

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 3238 is open?

On Linux run "ss -ltnup 'sport = :3238'", on macOS "lsof -nP -i :3238", and on Windows "netstat -ano | findstr :3238" to see the local process. From another machine, "nmap -p 3238 <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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