CyberHunter
Local dataset, no network
// Other services

Port 2603: Service Meter

Port 2603 is assigned by IANA to servicemeter (Service Meter).

2603

How servicemeter works

Other services
client:2603servicemeterresponse client:2603servicemeterresponse

The client sends a request to port 2603 and the servicemeter 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 2603 dangerous?

We have no specific security note for port 2603. 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 2603

ServicePortTransportDescriptionReferenceUpdated
servicemeter 2603 TCP, UDP Service Meter - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2603, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2603'      # process listening on 2603
sudo lsof -nP -i :2603

macOS

sudo lsof -nP -i :2603

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2603 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2603
netstat -ano | findstr :2603

From another machine

nmap -p 2603 -sV <host>
sudo nmap -sU -p 2603 <host>
nc -zv <host> 2603

Block it in the firewall

sudo ufw deny 2603/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2603" -Direction Inbound -LocalPort 2603 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2603 used for?

Port 2603 is assigned by IANA to servicemeter (Service Meter).

Is port 2603 TCP or UDP?

Port 2603 is registered for TCP and UDP.

Is it safe to open port 2603?

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 2603 is open?

On Linux run "ss -ltnup 'sport = :2603'", on macOS "lsof -nP -i :2603", and on Windows "netstat -ano | findstr :2603" to see the local process. From another machine, "nmap -p 2603 <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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