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// Other services

Port 2705: SDS Admin

Port 2705 is assigned by IANA to sds-admin (SDS Admin).

2705

How sds-admin works

Other services
client:2705sds-adminresponse client:2705sds-adminresponse

The client sends a request to port 2705 and the sds-admin 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 2705 dangerous?

We have no specific security note for port 2705. 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 2705

ServicePortTransportDescriptionReferenceUpdated
sds-admin 2705 TCP, UDP SDS Admin - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2705, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2705'      # process listening on 2705
sudo lsof -nP -i :2705

macOS

sudo lsof -nP -i :2705

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2705 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2705
netstat -ano | findstr :2705

From another machine

nmap -p 2705 -sV <host>
sudo nmap -sU -p 2705 <host>
nc -zv <host> 2705

Block it in the firewall

sudo ufw deny 2705/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2705" -Direction Inbound -LocalPort 2705 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2705 used for?

Port 2705 is assigned by IANA to sds-admin (SDS Admin).

Is port 2705 TCP or UDP?

Port 2705 is registered for TCP and UDP.

Is it safe to open port 2705?

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 2705 is open?

On Linux run "ss -ltnup 'sport = :2705'", on macOS "lsof -nP -i :2705", and on Windows "netstat -ano | findstr :2705" to see the local process. From another machine, "nmap -p 2705 <host>" shows whether it is reachable.

05 Related
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