HTTPfy

Port 2129 (cs-live)

IANA assigns port 2129 to cs-live: cs-live.com.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
cs-live TCP cs-live.com Matt Lachance -
cs-live UDP cs-live.com Matt Lachance -

Check what is listening on port 2129

Linux: is anything listening on TCP 2129?
sudo ss -tlnp 'sport = :2129'
Linux: UDP 2129
sudo ss -ulnp 'sport = :2129'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2129
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2129 '
Windows (Command Prompt)
netstat -ano | findstr :2129
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2129 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2129
From Windows
Test-NetConnection HOST -Port 2129
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2129

Block port 2129 in the firewall

ufw
sudo ufw deny 2129/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2129 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2129 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2129' -Direction Inbound -Protocol TCP -LocalPort 2129 -Action Block
ufw
sudo ufw deny 2129/udp
iptables
sudo iptables -A INPUT -p udp --dport 2129 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2129 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2129' -Direction Inbound -Protocol UDP -LocalPort 2129 -Action Block

Related ports

2127index-pc-wb2128net-steward2130xds2131avantageb2b

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