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// Other services

Port 7801: Secure Server Protocol - client

Port 7801 is assigned by IANA to ssp-client (Secure Server Protocol - client).

7801

How ssp-client works

Other services
client:7801ssp-clientresponse client:7801ssp-clientresponse

The client sends a request to port 7801 and the ssp-client 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 7801 dangerous?

We have no specific security note for port 7801. 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 7801

ServicePortTransportDescriptionReferenceUpdated
ssp-client 7801 TCP, UDP Secure Server Protocol - client - 2006-11

// source: IANA service name and port number registry

03 Check it

Which program uses port 7801, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7801'      # process listening on 7801
sudo lsof -nP -i :7801

macOS

sudo lsof -nP -i :7801

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7801 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7801
netstat -ano | findstr :7801

From another machine

nmap -p 7801 -sV <host>
sudo nmap -sU -p 7801 <host>
nc -zv <host> 7801

Block it in the firewall

sudo ufw deny 7801/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7801" -Direction Inbound -LocalPort 7801 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7801 used for?

Port 7801 is assigned by IANA to ssp-client (Secure Server Protocol - client).

Is port 7801 TCP or UDP?

Port 7801 is registered for TCP and UDP.

Is it safe to open port 7801?

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 7801 is open?

On Linux run "ss -ltnup 'sport = :7801'", on macOS "lsof -nP -i :7801", and on Windows "netstat -ano | findstr :7801" to see the local process. From another machine, "nmap -p 7801 <host>" shows whether it is reachable.

05 Related
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