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// Other services

Port 1093: PROOFD

Port 1093 is assigned by IANA to proofd (PROOFD).

1093

How proofd works

Other services
client:1093proofdresponse client:1093proofdresponse

The client sends a request to port 1093 and the proofd 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 1093 dangerous?

We have no specific security note for port 1093. 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 1093

ServicePortTransportDescriptionReferenceUpdated
proofd 1093 TCP, UDP PROOFD - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1093, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1093'      # process listening on 1093
sudo lsof -nP -i :1093

macOS

sudo lsof -nP -i :1093

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1093 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1093
netstat -ano | findstr :1093

From another machine

nmap -p 1093 -sV <host>
sudo nmap -sU -p 1093 <host>
nc -zv <host> 1093

Block it in the firewall

sudo ufw deny 1093/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1093" -Direction Inbound -LocalPort 1093 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1093 used for?

Port 1093 is assigned by IANA to proofd (PROOFD).

Is port 1093 TCP or UDP?

Port 1093 is registered for TCP and UDP.

Is it safe to open port 1093?

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 1093 is open?

On Linux run "ss -ltnup 'sport = :1093'", on macOS "lsof -nP -i :1093", and on Windows "netstat -ano | findstr :1093" to see the local process. From another machine, "nmap -p 1093 <host>" shows whether it is reachable.

05 Related
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