CyberHunter
Local dataset, no network
// Other services

Port 2748:

Port 2748 is assigned by IANA to fjippol-polsvr ().

2748

How fjippol-polsvr works

Other services
client:2748fjippol-polsvrresponse client:2748fjippol-polsvrresponse

The client sends a request to port 2748 and the fjippol-polsvr 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 2748 dangerous?

We have no specific security note for port 2748. 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 2748

ServicePortTransportDescriptionReferenceUpdated
fjippol-polsvr 2748 TCP, UDP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2748, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2748'      # process listening on 2748
sudo lsof -nP -i :2748

macOS

sudo lsof -nP -i :2748

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2748 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2748
netstat -ano | findstr :2748

From another machine

nmap -p 2748 -sV <host>
sudo nmap -sU -p 2748 <host>
nc -zv <host> 2748

Block it in the firewall

sudo ufw deny 2748/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2748" -Direction Inbound -LocalPort 2748 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2748 used for?

Port 2748 is assigned by IANA to fjippol-polsvr ().

Is port 2748 TCP or UDP?

Port 2748 is registered for TCP and UDP.

Is it safe to open port 2748?

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 2748 is open?

On Linux run "ss -ltnup 'sport = :2748'", on macOS "lsof -nP -i :2748", and on Windows "netstat -ano | findstr :2748" to see the local process. From another machine, "nmap -p 2748 <host>" shows whether it is reachable.

05 Related
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