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Port 4145 (vvr-control)

IANA assigns port 4145 to vvr-control: VVR Control.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
vvr-control TCP VVR Control Ming Xu -
vvr-control UDP VVR Control Ming Xu -

Check what is listening on port 4145

Linux: is anything listening on TCP 4145?
sudo ss -tlnp 'sport = :4145'
Linux: UDP 4145
sudo ss -ulnp 'sport = :4145'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4145
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4145 '
Windows (Command Prompt)
netstat -ano | findstr :4145
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4145 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4145
From Windows
Test-NetConnection HOST -Port 4145
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4145

Block port 4145 in the firewall

ufw
sudo ufw deny 4145/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4145 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4145 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4145' -Direction Inbound -Protocol TCP -LocalPort 4145 -Action Block
ufw
sudo ufw deny 4145/udp
iptables
sudo iptables -A INPUT -p udp --dport 4145 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4145 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4145' -Direction Inbound -Protocol UDP -LocalPort 4145 -Action Block

Related ports

4142oidocsvc4143oidsr4146tgcconnect4147vrxpservman

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