CyberHunter
Local dataset, no network
// Other services

Port 1271: eXcW

Port 1271 is assigned by IANA to excw (eXcW).

1271

How excw works

Other services
client:1271excwresponse client:1271excwresponse

The client sends a request to port 1271 and the excw 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 1271 dangerous?

We have no specific security note for port 1271. 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 1271

ServicePortTransportDescriptionReferenceUpdated
excw 1271 TCP, UDP eXcW - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1271, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1271'      # process listening on 1271
sudo lsof -nP -i :1271

macOS

sudo lsof -nP -i :1271

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1271 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1271
netstat -ano | findstr :1271

From another machine

nmap -p 1271 -sV <host>
sudo nmap -sU -p 1271 <host>
nc -zv <host> 1271

Block it in the firewall

sudo ufw deny 1271/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1271" -Direction Inbound -LocalPort 1271 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1271 used for?

Port 1271 is assigned by IANA to excw (eXcW).

Is port 1271 TCP or UDP?

Port 1271 is registered for TCP and UDP.

Is it safe to open port 1271?

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 1271 is open?

On Linux run "ss -ltnup 'sport = :1271'", on macOS "lsof -nP -i :1271", and on Windows "netstat -ano | findstr :1271" to see the local process. From another machine, "nmap -p 1271 <host>" shows whether it is reachable.

05 Related
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