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Port 2502 (kentrox-prot)

IANA assigns port 2502 to kentrox-prot: Kentrox Protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
kentrox-prot TCP Kentrox Protocol Anil Lakhwara -
kentrox-prot UDP Kentrox Protocol Anil Lakhwara -

Check what is listening on port 2502

Linux: is anything listening on TCP 2502?
sudo ss -tlnp 'sport = :2502'
Linux: UDP 2502
sudo ss -ulnp 'sport = :2502'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2502
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2502 '
Windows (Command Prompt)
netstat -ano | findstr :2502
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2502 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2502
From Windows
Test-NetConnection HOST -Port 2502
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2502

Block port 2502 in the firewall

ufw
sudo ufw deny 2502/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2502 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2502 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2502' -Direction Inbound -Protocol TCP -LocalPort 2502 -Action Block
ufw
sudo ufw deny 2502/udp
iptables
sudo iptables -A INPUT -p udp --dport 2502 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2502 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2502' -Direction Inbound -Protocol UDP -LocalPort 2502 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.