- 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 4370: ELPRO V2 Protocol Tunnel
Port 4370 is assigned by IANA to elpro_tunnel (ELPRO V2 Protocol Tunnel), elpro-tunnel (ELPRO V2 Protocol Tunnel IANA assigned this well-formed service name as a replacement for "elpro_tunnel".).
4370
How elpro_tunnel works
VPN, tunnels & proxiesTraffic is wrapped in a tunnel between the two ends, so the network in between only sees the tunnel.
- Transport
- TCP · UDP
- Exposure risk
- not rated depends on the program listening
- Encryption
- Unknownnot stated by the registry
- IANA status
- Assigned2 registered services
- Range
- Registered (1024-49151)
- Category
- VPN, tunnels & proxies
Is port 4370 dangerous?
We have no specific security note for port 4370. Its risk depends on the program actually listening on it. General advice for vpn, tunnels & proxies services:
IANA registry entries for port 4370
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| elpro_tunnel | 4370 | TCP, UDP | ELPRO V2 Protocol Tunnel | - | 2008-04-14 |
| elpro-tunnel | 4370 | TCP, UDP | ELPRO V2 Protocol Tunnel IANA assigned this well-formed service name as a replacement for "elpro_tunnel". | - | 2008-04-14 |
// source: IANA service name and port number registry
Which program uses port 4370, and is it reachable?
Linux
sudo ss -ltnup 'sport = :4370' # process listening on 4370
sudo lsof -nP -i :4370macOS
sudo lsof -nP -i :4370
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4370 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 4370 netstat -ano | findstr :4370
From another machine
nmap -p 4370 -sV <host> sudo nmap -sU -p 4370 <host> nc -zv <host> 4370
Block it in the firewall
sudo ufw deny 4370/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 4370" -Direction Inbound -LocalPort 4370 -Protocol TCP -Action Block # Windows
What is port 4370 used for?
Port 4370 is assigned by IANA to elpro_tunnel (ELPRO V2 Protocol Tunnel), elpro-tunnel (ELPRO V2 Protocol Tunnel IANA assigned this well-formed service name as a replacement for "elpro_tunnel".).
Is port 4370 TCP or UDP?
Port 4370 is registered for TCP and UDP.
Is it safe to open port 4370?
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 4370 is open?
On Linux run "ss -ltnup 'sport = :4370'", on macOS "lsof -nP -i :4370", and on Windows "netstat -ano | findstr :4370" to see the local process. From another machine, "nmap -p 4370 <host>" shows whether it is reachable.