CyberHunter
Local dataset, no network
// Other services

Port 95: SUPDUP

Port 95 is assigned by IANA to supdup (SUPDUP).

95

How supdup works

Other services
client:95supdupresponse client:95supdupresponse

The client sends a request to port 95 and the supdup 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 95 dangerous?

We have no specific security note for port 95. 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 95

ServicePortTransportDescriptionReferenceUpdated
supdup 95 TCP, UDP SUPDUP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 95, and is it reachable?

Linux

sudo ss -ltnup 'sport = :95'      # process listening on 95
sudo lsof -nP -i :95

macOS

sudo lsof -nP -i :95

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 95 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 95
netstat -ano | findstr :95

From another machine

nmap -p 95 -sV <host>
sudo nmap -sU -p 95 <host>
nc -zv <host> 95

Block it in the firewall

sudo ufw deny 95/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 95" -Direction Inbound -LocalPort 95 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 95 used for?

Port 95 is assigned by IANA to supdup (SUPDUP).

Is port 95 TCP or UDP?

Port 95 is registered for TCP and UDP.

Is it safe to open port 95?

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 95 is open?

On Linux run "ss -ltnup 'sport = :95'", on macOS "lsof -nP -i :95", and on Windows "netstat -ano | findstr :95" to see the local process. From another machine, "nmap -p 95 <host>" shows whether it is reachable.

05 Related
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