CyberHunter
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// Other services

Port 4149: A10 GSLB Service

Port 4149 is assigned by IANA to agslb (A10 GSLB Service).

4149

How agslb works

Other services
client:4149agslbresponse client:4149agslbresponse

The client sends a request to port 4149 and the agslb 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 4149 dangerous?

We have no specific security note for port 4149. 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 4149

ServicePortTransportDescriptionReferenceUpdated
agslb 4149 TCP, UDP A10 GSLB Service - 2007-07-02

// source: IANA service name and port number registry

03 Check it

Which program uses port 4149, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4149'      # process listening on 4149
sudo lsof -nP -i :4149

macOS

sudo lsof -nP -i :4149

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4149 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4149
netstat -ano | findstr :4149

From another machine

nmap -p 4149 -sV <host>
sudo nmap -sU -p 4149 <host>
nc -zv <host> 4149

Block it in the firewall

sudo ufw deny 4149/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4149" -Direction Inbound -LocalPort 4149 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4149 used for?

Port 4149 is assigned by IANA to agslb (A10 GSLB Service).

Is port 4149 TCP or UDP?

Port 4149 is registered for TCP and UDP.

Is it safe to open port 4149?

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 4149 is open?

On Linux run "ss -ltnup 'sport = :4149'", on macOS "lsof -nP -i :4149", and on Windows "netstat -ano | findstr :4149" to see the local process. From another machine, "nmap -p 4149 <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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