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Port 2402 (taskmaster2000)

IANA assigns port 2402 to taskmaster2000: TaskMaster 2000 Server.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
taskmaster2000 TCP TaskMaster 2000 Server - -
taskmaster2000 UDP TaskMaster 2000 Server - -

Check what is listening on port 2402

Linux: is anything listening on TCP 2402?
sudo ss -tlnp 'sport = :2402'
Linux: UDP 2402
sudo ss -ulnp 'sport = :2402'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2402
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2402 '
Windows (Command Prompt)
netstat -ano | findstr :2402
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2402 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2402
From Windows
Test-NetConnection HOST -Port 2402
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2402

Block port 2402 in the firewall

ufw
sudo ufw deny 2402/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2402 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2402 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2402' -Direction Inbound -Protocol TCP -LocalPort 2402 -Action Block
ufw
sudo ufw deny 2402/udp
iptables
sudo iptables -A INPUT -p udp --dport 2402 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2402 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2402' -Direction Inbound -Protocol UDP -LocalPort 2402 -Action Block

Related ports

2403taskmaster20002400opequus-server2401cvspserver2404iec-104

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