- 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.
Port 4396: Fly Object Space
Port 4396 is assigned by IANA to fly (Fly Object Space).
4396
How fly works
Other servicesThe client sends a request to port 4396 and the fly service answers.
- Transport
- TCP
- 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
Is port 4396 dangerous?
We have no specific security note for port 4396. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 4396
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| fly | 4396 | TCP | Fly Object Space | - | 2009-02-12 |
| - | 4396 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 4396, and is it reachable?
Linux
sudo ss -ltnup 'sport = :4396' # process listening on 4396
sudo lsof -nP -i :4396macOS
sudo lsof -nP -i :4396
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4396 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 4396 netstat -ano | findstr :4396
From another machine
nmap -p 4396 -sV <host> nc -zv <host> 4396
Block it in the firewall
sudo ufw deny 4396/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 4396" -Direction Inbound -LocalPort 4396 -Protocol TCP -Action Block # Windows
What is port 4396 used for?
Port 4396 is assigned by IANA to fly (Fly Object Space).
Is port 4396 TCP or UDP?
Port 4396 is registered for TCP.
Is it safe to open port 4396?
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 4396 is open?
On Linux run "ss -ltnup 'sport = :4396'", on macOS "lsof -nP -i :4396", and on Windows "netstat -ano | findstr :4396" to see the local process. From another machine, "nmap -p 4396 <host>" shows whether it is reachable.
Other other services ports
: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