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// Other services

Port 3048: Sierra Net PC Trader

Port 3048 is assigned by IANA to pctrader (Sierra Net PC Trader).

3048

How pctrader works

Other services
client:3048pctraderresponse client:3048pctraderresponse

The client sends a request to port 3048 and the pctrader 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 3048 dangerous?

We have no specific security note for port 3048. 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 3048

ServicePortTransportDescriptionReferenceUpdated
pctrader 3048 TCP, UDP Sierra Net PC Trader - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3048, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3048'      # process listening on 3048
sudo lsof -nP -i :3048

macOS

sudo lsof -nP -i :3048

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3048 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3048
netstat -ano | findstr :3048

From another machine

nmap -p 3048 -sV <host>
sudo nmap -sU -p 3048 <host>
nc -zv <host> 3048

Block it in the firewall

sudo ufw deny 3048/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3048" -Direction Inbound -LocalPort 3048 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3048 used for?

Port 3048 is assigned by IANA to pctrader (Sierra Net PC Trader).

Is port 3048 TCP or UDP?

Port 3048 is registered for TCP and UDP.

Is it safe to open port 3048?

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 3048 is open?

On Linux run "ss -ltnup 'sport = :3048'", on macOS "lsof -nP -i :3048", and on Windows "netstat -ano | findstr :3048" to see the local process. From another machine, "nmap -p 3048 <host>" shows whether it is reachable.

05 Related
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