HTTPfy

Port 25002 (icl-twobase3)

IANA assigns port 25002 to icl-twobase3.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
icl-twobase3 TCP icl-twobase3 J A Sever -
icl-twobase3 UDP icl-twobase3 J A Sever -

Check what is listening on port 25002

Linux: is anything listening on TCP 25002?
sudo ss -tlnp 'sport = :25002'
Linux: UDP 25002
sudo ss -ulnp 'sport = :25002'
Linux / macOS: which process owns the port
sudo lsof -nP -i :25002
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':25002 '
Windows (Command Prompt)
netstat -ano | findstr :25002
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 25002 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 25002
From Windows
Test-NetConnection HOST -Port 25002
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 25002

Block port 25002 in the firewall

ufw
sudo ufw deny 25002/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 25002 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 25002 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 25002' -Direction Inbound -Protocol TCP -LocalPort 25002 -Action Block
ufw
sudo ufw deny 25002/udp
iptables
sudo iptables -A INPUT -p udp --dport 25002 -j DROP
nftables
sudo nft add rule inet filter input udp dport 25002 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 25002' -Direction Inbound -Protocol UDP -LocalPort 25002 -Action Block

Related ports

25000icl-twobase125001icl-twobase225003icl-twobase425004icl-twobase5

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