CyberHunter
Local dataset, no network
// Other services

Port 434: MobileIP-Agent

Port 434 is assigned by IANA to mobileip-agent (MobileIP-Agent).

434

How mobileip-agent works

Other services
client:434mobileip-agentresponse client:434mobileip-agentresponse

The client sends a request to port 434 and the mobileip-agent 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 434 dangerous?

We have no specific security note for port 434. 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 434

ServicePortTransportDescriptionReferenceUpdated
mobileip-agent 434 TCP, UDP MobileIP-Agent - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 434, and is it reachable?

Linux

sudo ss -ltnup 'sport = :434'      # process listening on 434
sudo lsof -nP -i :434

macOS

sudo lsof -nP -i :434

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 434 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 434
netstat -ano | findstr :434

From another machine

nmap -p 434 -sV <host>
sudo nmap -sU -p 434 <host>
nc -zv <host> 434

Block it in the firewall

sudo ufw deny 434/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 434" -Direction Inbound -LocalPort 434 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 434 used for?

Port 434 is assigned by IANA to mobileip-agent (MobileIP-Agent).

Is port 434 TCP or UDP?

Port 434 is registered for TCP and UDP.

Is it safe to open port 434?

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 434 is open?

On Linux run "ss -ltnup 'sport = :434'", on macOS "lsof -nP -i :434", and on Windows "netstat -ano | findstr :434" to see the local process. From another machine, "nmap -p 434 <host>" shows whether it is reachable.

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