HTTPfy

Port 4112 (apple-vpns-rp)

IANA assigns port 4112 to apple-vpns-rp: Apple VPN Server Reporting Protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
apple-vpns-rp TCP Apple VPN Server Reporting Protocol Christophe Allie -
apple-vpns-rp UDP Apple VPN Server Reporting Protocol Christophe Allie -

Registry dates for this port: registered 2006-08.

Check what is listening on port 4112

Linux: is anything listening on TCP 4112?
sudo ss -tlnp 'sport = :4112'
Linux: UDP 4112
sudo ss -ulnp 'sport = :4112'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4112
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4112 '
Windows (Command Prompt)
netstat -ano | findstr :4112
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4112 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4112
From Windows
Test-NetConnection HOST -Port 4112
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4112

Block port 4112 in the firewall

ufw
sudo ufw deny 4112/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4112 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4112 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4112' -Direction Inbound -Protocol TCP -LocalPort 4112 -Action Block
ufw
sudo ufw deny 4112/udp
iptables
sudo iptables -A INPUT -p udp --dport 4112 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4112 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4112' -Direction Inbound -Protocol UDP -LocalPort 4112 -Action Block

Related ports

4110g2tag4111xgrid4113aipn-reg4114jomamqmonitor

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.