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Port 2270 (starschool)

IANA assigns port 2270 to starschool: starSchool.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
starschool TCP starSchool Adam Ernst -
starschool UDP starSchool Adam Ernst -

Registry dates for this port: registered 2004-12.

Check what is listening on port 2270

Linux: is anything listening on TCP 2270?
sudo ss -tlnp 'sport = :2270'
Linux: UDP 2270
sudo ss -ulnp 'sport = :2270'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2270
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2270 '
Windows (Command Prompt)
netstat -ano | findstr :2270
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2270 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2270
From Windows
Test-NetConnection HOST -Port 2270
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2270

Block port 2270 in the firewall

ufw
sudo ufw deny 2270/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2270 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2270 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2270' -Direction Inbound -Protocol TCP -LocalPort 2270 -Action Block
ufw
sudo ufw deny 2270/udp
iptables
sudo iptables -A INPUT -p udp --dport 2270 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2270 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2270' -Direction Inbound -Protocol UDP -LocalPort 2270 -Action Block

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