CyberHunter
Local dataset, no network
// Other services

Port 5598: MCT Market Data Feed

Port 5598 is assigned by IANA to mctfeed (MCT Market Data Feed).

5598

How mctfeed works

Other services
client:5598mctfeedresponse client:5598mctfeedresponse

The client sends a request to port 5598 and the mctfeed 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 5598 dangerous?

We have no specific security note for port 5598. 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 5598

ServicePortTransportDescriptionReferenceUpdated
mctfeed 5598 TCP, UDP MCT Market Data Feed - 2006-05

// source: IANA service name and port number registry

03 Check it

Which program uses port 5598, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5598'      # process listening on 5598
sudo lsof -nP -i :5598

macOS

sudo lsof -nP -i :5598

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5598 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5598
netstat -ano | findstr :5598

From another machine

nmap -p 5598 -sV <host>
sudo nmap -sU -p 5598 <host>
nc -zv <host> 5598

Block it in the firewall

sudo ufw deny 5598/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5598" -Direction Inbound -LocalPort 5598 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5598 used for?

Port 5598 is assigned by IANA to mctfeed (MCT Market Data Feed).

Is port 5598 TCP or UDP?

Port 5598 is registered for TCP and UDP.

Is it safe to open port 5598?

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 5598 is open?

On Linux run "ss -ltnup 'sport = :5598'", on macOS "lsof -nP -i :5598", and on Windows "netstat -ano | findstr :5598" to see the local process. From another machine, "nmap -p 5598 <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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