HTTPfy

Port 4188 (vatata)

IANA assigns port 4188 to vatata: Vatata Peer to Peer Protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
vatata TCP Vatata Peer to Peer Protocol Song Jian -
vatata UDP Vatata Peer to Peer Protocol Song Jian -

Registry dates for this port: registered 2008-09-15.

Check what is listening on port 4188

Linux: is anything listening on TCP 4188?
sudo ss -tlnp 'sport = :4188'
Linux: UDP 4188
sudo ss -ulnp 'sport = :4188'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4188
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4188 '
Windows (Command Prompt)
netstat -ano | findstr :4188
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4188 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4188
From Windows
Test-NetConnection HOST -Port 4188
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4188

Block port 4188 in the firewall

ufw
sudo ufw deny 4188/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4188 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4188 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4188' -Direction Inbound -Protocol TCP -LocalPort 4188 -Action Block
ufw
sudo ufw deny 4188/udp
iptables
sudo iptables -A INPUT -p udp --dport 4188 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4188 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4188' -Direction Inbound -Protocol UDP -LocalPort 4188 -Action Block

Related ports

4186boxbackupstore4187csc-proxy, csc_proxy4189pcep4190sieve

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