CyberHunter
Local dataset, no network
// Other services

Port 2636: Solve

Port 2636 is assigned by IANA to solve (Solve).

2636

How solve works

Other services
client:2636solveresponse client:2636solveresponse

The client sends a request to port 2636 and the solve 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 2636 dangerous?

We have no specific security note for port 2636. 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 2636

ServicePortTransportDescriptionReferenceUpdated
solve 2636 TCP, UDP Solve - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2636, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2636'      # process listening on 2636
sudo lsof -nP -i :2636

macOS

sudo lsof -nP -i :2636

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2636 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2636
netstat -ano | findstr :2636

From another machine

nmap -p 2636 -sV <host>
sudo nmap -sU -p 2636 <host>
nc -zv <host> 2636

Block it in the firewall

sudo ufw deny 2636/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2636" -Direction Inbound -LocalPort 2636 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2636 used for?

Port 2636 is assigned by IANA to solve (Solve).

Is port 2636 TCP or UDP?

Port 2636 is registered for TCP and UDP.

Is it safe to open port 2636?

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 2636 is open?

On Linux run "ss -ltnup 'sport = :2636'", on macOS "lsof -nP -i :2636", and on Windows "netstat -ano | findstr :2636" to see the local process. From another machine, "nmap -p 2636 <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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