CyberHunter
Local dataset, no network
// Other services

Port 2775: SMPP

Port 2775 is assigned by IANA to smpp (SMPP).

2775

How smpp works

Other services
client:2775smppresponse client:2775smppresponse

The client sends a request to port 2775 and the smpp 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 2775 dangerous?

We have no specific security note for port 2775. 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 2775

ServicePortTransportDescriptionReferenceUpdated
smpp 2775 TCP, UDP SMPP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2775, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2775'      # process listening on 2775
sudo lsof -nP -i :2775

macOS

sudo lsof -nP -i :2775

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2775 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2775
netstat -ano | findstr :2775

From another machine

nmap -p 2775 -sV <host>
sudo nmap -sU -p 2775 <host>
nc -zv <host> 2775

Block it in the firewall

sudo ufw deny 2775/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2775" -Direction Inbound -LocalPort 2775 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2775 used for?

Port 2775 is assigned by IANA to smpp (SMPP).

Is port 2775 TCP or UDP?

Port 2775 is registered for TCP and UDP.

Is it safe to open port 2775?

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 2775 is open?

On Linux run "ss -ltnup 'sport = :2775'", on macOS "lsof -nP -i :2775", and on Windows "netstat -ano | findstr :2775" to see the local process. From another machine, "nmap -p 2775 <host>" shows whether it is reachable.

05 Related
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