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// Other services

Port 1250: swldy-sias

Port 1250 is assigned by IANA to swldy-sias (swldy-sias).

1250

How swldy-sias works

Other services
client:1250swldy-siasresponse client:1250swldy-siasresponse

The client sends a request to port 1250 and the swldy-sias 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 1250 dangerous?

We have no specific security note for port 1250. 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 1250

ServicePortTransportDescriptionReferenceUpdated
swldy-sias 1250 TCP, UDP swldy-sias - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1250, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1250'      # process listening on 1250
sudo lsof -nP -i :1250

macOS

sudo lsof -nP -i :1250

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1250 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1250
netstat -ano | findstr :1250

From another machine

nmap -p 1250 -sV <host>
sudo nmap -sU -p 1250 <host>
nc -zv <host> 1250

Block it in the firewall

sudo ufw deny 1250/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1250" -Direction Inbound -LocalPort 1250 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1250 used for?

Port 1250 is assigned by IANA to swldy-sias (swldy-sias).

Is port 1250 TCP or UDP?

Port 1250 is registered for TCP and UDP.

Is it safe to open port 1250?

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 1250 is open?

On Linux run "ss -ltnup 'sport = :1250'", on macOS "lsof -nP -i :1250", and on Windows "netstat -ano | findstr :1250" to see the local process. From another machine, "nmap -p 1250 <host>" shows whether it is reachable.

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