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Port 3023 (magicnotes)

IANA assigns port 3023 to magicnotes.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
magicnotes TCP magicnotes Karl Edwall -
magicnotes UDP magicnotes Karl Edwall -

Check what is listening on port 3023

Linux: is anything listening on TCP 3023?
sudo ss -tlnp 'sport = :3023'
Linux: UDP 3023
sudo ss -ulnp 'sport = :3023'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3023
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3023 '
Windows (Command Prompt)
netstat -ano | findstr :3023
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3023 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3023
From Windows
Test-NetConnection HOST -Port 3023
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3023

Block port 3023 in the firewall

ufw
sudo ufw deny 3023/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3023 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3023 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3023' -Direction Inbound -Protocol TCP -LocalPort 3023 -Action Block
ufw
sudo ufw deny 3023/udp
iptables
sudo iptables -A INPUT -p udp --dport 3023 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3023 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3023' -Direction Inbound -Protocol UDP -LocalPort 3023 -Action Block

Related ports

3021agriserver3022csregagent3024nds-sso, nds_sso3025arepa-raft

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