CyberHunter
Local dataset, no network
// Other services

Port 3408: BES Api Port

Port 3408 is assigned by IANA to BESApi (BES Api Port).

3408

How BESApi works

Other services
client:3408BESApiresponse client:3408BESApiresponse

The client sends a request to port 3408 and the BESApi 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 3408 dangerous?

We have no specific security note for port 3408. 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 3408

ServicePortTransportDescriptionReferenceUpdated
BESApi 3408 TCP, UDP BES Api Port - 2002-02

// source: IANA service name and port number registry

03 Check it

Which program uses port 3408, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3408'      # process listening on 3408
sudo lsof -nP -i :3408

macOS

sudo lsof -nP -i :3408

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3408 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3408
netstat -ano | findstr :3408

From another machine

nmap -p 3408 -sV <host>
sudo nmap -sU -p 3408 <host>
nc -zv <host> 3408

Block it in the firewall

sudo ufw deny 3408/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3408" -Direction Inbound -LocalPort 3408 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3408 used for?

Port 3408 is assigned by IANA to BESApi (BES Api Port).

Is port 3408 TCP or UDP?

Port 3408 is registered for TCP and UDP.

Is it safe to open port 3408?

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 3408 is open?

On Linux run "ss -ltnup 'sport = :3408'", on macOS "lsof -nP -i :3408", and on Windows "netstat -ano | findstr :3408" to see the local process. From another machine, "nmap -p 3408 <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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