CyberHunter
Local dataset, no network
// Other services

Port 1877: hp-webqosdb

Port 1877 is assigned by IANA to hp-webqosdb (hp-webqosdb).

1877

How hp-webqosdb works

Other services
client:1877hp-webqosdbresponse client:1877hp-webqosdbresponse

The client sends a request to port 1877 and the hp-webqosdb 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 1877 dangerous?

We have no specific security note for port 1877. 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 1877

ServicePortTransportDescriptionReferenceUpdated
hp-webqosdb 1877 TCP, UDP hp-webqosdb - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1877, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1877'      # process listening on 1877
sudo lsof -nP -i :1877

macOS

sudo lsof -nP -i :1877

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1877 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1877
netstat -ano | findstr :1877

From another machine

nmap -p 1877 -sV <host>
sudo nmap -sU -p 1877 <host>
nc -zv <host> 1877

Block it in the firewall

sudo ufw deny 1877/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1877" -Direction Inbound -LocalPort 1877 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1877 used for?

Port 1877 is assigned by IANA to hp-webqosdb (hp-webqosdb).

Is port 1877 TCP or UDP?

Port 1877 is registered for TCP and UDP.

Is it safe to open port 1877?

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 1877 is open?

On Linux run "ss -ltnup 'sport = :1877'", on macOS "lsof -nP -i :1877", and on Windows "netstat -ano | findstr :1877" to see the local process. From another machine, "nmap -p 1877 <host>" shows whether it is reachable.

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