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Port 14141 (vcs-app)

IANA assigns port 14141 to vcs-app: VCS Application.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
vcs-app TCP VCS Application Ming Xu -
vcs-app UDP VCS Application Ming Xu -

Check what is listening on port 14141

Linux: is anything listening on TCP 14141?
sudo ss -tlnp 'sport = :14141'
Linux: UDP 14141
sudo ss -ulnp 'sport = :14141'
Linux / macOS: which process owns the port
sudo lsof -nP -i :14141
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':14141 '
Windows (Command Prompt)
netstat -ano | findstr :14141
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 14141 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 14141
From Windows
Test-NetConnection HOST -Port 14141
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 14141

Block port 14141 in the firewall

ufw
sudo ufw deny 14141/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 14141 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 14141 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 14141' -Direction Inbound -Protocol TCP -LocalPort 14141 -Action Block
ufw
sudo ufw deny 14141/udp
iptables
sudo iptables -A INPUT -p udp --dport 14141 -j DROP
nftables
sudo nft add rule inet filter input udp dport 14141 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 14141' -Direction Inbound -Protocol UDP -LocalPort 14141 -Action Block

Related ports

14033sage-best-com114034sage-best-com214142icpp14143icpps

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