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// Other services

Port 1161: Health Polling

Port 1161 is assigned by IANA to health-polling (Health Polling).

1161

How health-polling works

Other services
client:1161health-pollingresponse client:1161health-pollingresponse

The client sends a request to port 1161 and the health-polling 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 1161 dangerous?

We have no specific security note for port 1161. 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 1161

ServicePortTransportDescriptionReferenceUpdated
health-polling 1161 TCP, UDP Health Polling - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1161, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1161'      # process listening on 1161
sudo lsof -nP -i :1161

macOS

sudo lsof -nP -i :1161

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1161 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1161
netstat -ano | findstr :1161

From another machine

nmap -p 1161 -sV <host>
sudo nmap -sU -p 1161 <host>
nc -zv <host> 1161

Block it in the firewall

sudo ufw deny 1161/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1161" -Direction Inbound -LocalPort 1161 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1161 used for?

Port 1161 is assigned by IANA to health-polling (Health Polling).

Is port 1161 TCP or UDP?

Port 1161 is registered for TCP and UDP.

Is it safe to open port 1161?

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 1161 is open?

On Linux run "ss -ltnup 'sport = :1161'", on macOS "lsof -nP -i :1161", and on Windows "netstat -ano | findstr :1161" to see the local process. From another machine, "nmap -p 1161 <host>" shows whether it is reachable.

05 Related
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