- 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 4112: Apple VPN Server Reporting Protocol
Port 4112 is assigned by IANA to apple-vpns-rp (Apple VPN Server Reporting Protocol).
4112
How apple-vpns-rp 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
- Assigned1 registered service
- Range
- Registered (1024-49151)
- Category
- VPN, tunnels & proxies
Is port 4112 dangerous?
We have no specific security note for port 4112. Its risk depends on the program actually listening on it. General advice for vpn, tunnels & proxies services:
IANA registry entries for port 4112
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| apple-vpns-rp | 4112 | TCP, UDP | Apple VPN Server Reporting Protocol | - | 2006-08 |
// source: IANA service name and port number registry
Which program uses port 4112, and is it reachable?
Linux
sudo ss -ltnup 'sport = :4112' # process listening on 4112
sudo lsof -nP -i :4112macOS
sudo lsof -nP -i :4112
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4112 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 4112 netstat -ano | findstr :4112
From another machine
nmap -p 4112 -sV <host> sudo nmap -sU -p 4112 <host> nc -zv <host> 4112
Block it in the firewall
sudo ufw deny 4112/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 4112" -Direction Inbound -LocalPort 4112 -Protocol TCP -Action Block # Windows
What is port 4112 used for?
Port 4112 is assigned by IANA to apple-vpns-rp (Apple VPN Server Reporting Protocol).
Is port 4112 TCP or UDP?
Port 4112 is registered for TCP and UDP.
Is it safe to open port 4112?
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 4112 is open?
On Linux run "ss -ltnup 'sport = :4112'", on macOS "lsof -nP -i :4112", and on Windows "netstat -ano | findstr :4112" to see the local process. From another machine, "nmap -p 4112 <host>" shows whether it is reachable.