- Patch VPN gateways quickly: they are a top initial access target.
- Use certificates or MFA rather than shared secrets.
- Investigate unexpected tunnels and proxies: they are also attacker tools.
Port 30004: Amicon FPSU-IP VPN
Port 30004 is assigned by IANA to amicon-fpsu-s (Amicon FPSU-IP VPN).
30004
How amicon-fpsu-s works
VPN, tunnels & proxiesTraffic is wrapped in a tunnel between the two ends, so the network in between only sees the tunnel.
- Transport
- 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
- VPN, tunnels & proxies
Is port 30004 dangerous?
We have no specific security note for port 30004. Its risk depends on the program actually listening on it. General advice for vpn, tunnels & proxies services:
IANA registry entries for port 30004
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| amicon-fpsu-s | 30004 | UDP | Amicon FPSU-IP VPN | - | 2013-04-25 |
| - | 30004 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 30004, and is it reachable?
Linux
sudo ss -ltnup 'sport = :30004' # process listening on 30004
sudo lsof -nP -i :30004macOS
sudo lsof -nP -i :30004
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 30004 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 30004 netstat -ano | findstr :30004
From another machine
nmap -p 30004 -sV <host> sudo nmap -sU -p 30004 <host> nc -zv <host> 30004
Block it in the firewall
sudo ufw deny 30004/udp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 30004" -Direction Inbound -LocalPort 30004 -Protocol UDP -Action Block # Windows
What is port 30004 used for?
Port 30004 is assigned by IANA to amicon-fpsu-s (Amicon FPSU-IP VPN).
Is port 30004 TCP or UDP?
Port 30004 is registered for UDP.
Is it safe to open port 30004?
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. Patch VPN gateways quickly: they are a top initial access target.
How do I check if port 30004 is open?
On Linux run "ss -ltnup 'sport = :30004'", on macOS "lsof -nP -i :30004", and on Windows "netstat -ano | findstr :30004" to see the local process. From another machine, "nmap -p 30004 <host>" shows whether it is reachable.