CyberHunter
Local dataset, no network
// Other services

Port 2755: Express Pay

Port 2755 is assigned by IANA to expresspay (Express Pay).

2755

How expresspay works

Other services
client:2755expresspayresponse client:2755expresspayresponse

The client sends a request to port 2755 and the expresspay 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 2755 dangerous?

We have no specific security note for port 2755. 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 2755

ServicePortTransportDescriptionReferenceUpdated
expresspay 2755 TCP, UDP Express Pay - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2755, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2755'      # process listening on 2755
sudo lsof -nP -i :2755

macOS

sudo lsof -nP -i :2755

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2755 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2755
netstat -ano | findstr :2755

From another machine

nmap -p 2755 -sV <host>
sudo nmap -sU -p 2755 <host>
nc -zv <host> 2755

Block it in the firewall

sudo ufw deny 2755/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2755" -Direction Inbound -LocalPort 2755 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2755 used for?

Port 2755 is assigned by IANA to expresspay (Express Pay).

Is port 2755 TCP or UDP?

Port 2755 is registered for TCP and UDP.

Is it safe to open port 2755?

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 2755 is open?

On Linux run "ss -ltnup 'sport = :2755'", on macOS "lsof -nP -i :2755", and on Windows "netstat -ano | findstr :2755" to see the local process. From another machine, "nmap -p 2755 <host>" shows whether it is reachable.

05 Related
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