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// Other services

Port 3424: xTrade over TLS/SSL

Port 3424 is assigned by IANA to xtrms (xTrade over TLS/SSL).

3424

How xtrms works

Other services
client:3424#%&@!x9response? client:3424#%&@!x9response?

The client sends a request to port 3424 and the xtrms service answers. Everything is encrypted: someone on the path only sees unreadable bytes.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
EncryptedTLS or built-in crypto
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 3424 dangerous?

We have no specific security note for port 3424. 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 3424

ServicePortTransportDescriptionReferenceUpdated
xtrms 3424 TCP, UDP xTrade over TLS/SSL - 2002-02

// source: IANA service name and port number registry

03 Check it

Which program uses port 3424, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3424'      # process listening on 3424
sudo lsof -nP -i :3424

macOS

sudo lsof -nP -i :3424

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3424 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3424
netstat -ano | findstr :3424

From another machine

nmap -p 3424 -sV <host>
sudo nmap -sU -p 3424 <host>
nc -zv <host> 3424

Block it in the firewall

sudo ufw deny 3424/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3424" -Direction Inbound -LocalPort 3424 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3424 used for?

Port 3424 is assigned by IANA to xtrms (xTrade over TLS/SSL).

Is port 3424 TCP or UDP?

Port 3424 is registered for TCP and UDP.

Is it safe to open port 3424?

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 3424 is open?

On Linux run "ss -ltnup 'sport = :3424'", on macOS "lsof -nP -i :3424", and on Windows "netstat -ano | findstr :3424" to see the local process. From another machine, "nmap -p 3424 <host>" shows whether it is reachable.

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