CyberHunter
Local dataset, no network
// Other services

Port 5400: Excerpt Search

Port 5400 is assigned by IANA to excerpt (Excerpt Search).

5400

How excerpt works

Other services
client:5400excerptresponse client:5400excerptresponse

The client sends a request to port 5400 and the excerpt 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 5400 dangerous?

We have no specific security note for port 5400. 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 5400

ServicePortTransportDescriptionReferenceUpdated
excerpt 5400 TCP, UDP Excerpt Search - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 5400, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5400'      # process listening on 5400
sudo lsof -nP -i :5400

macOS

sudo lsof -nP -i :5400

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5400 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5400
netstat -ano | findstr :5400

From another machine

nmap -p 5400 -sV <host>
sudo nmap -sU -p 5400 <host>
nc -zv <host> 5400

Block it in the firewall

sudo ufw deny 5400/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5400" -Direction Inbound -LocalPort 5400 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5400 used for?

Port 5400 is assigned by IANA to excerpt (Excerpt Search).

Is port 5400 TCP or UDP?

Port 5400 is registered for TCP and UDP.

Is it safe to open port 5400?

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 5400 is open?

On Linux run "ss -ltnup 'sport = :5400'", on macOS "lsof -nP -i :5400", and on Windows "netstat -ano | findstr :5400" to see the local process. From another machine, "nmap -p 5400 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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