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Port 1355 (intuitive-edge)

IANA assigns port 1355 to intuitive-edge: Intuitive Edge.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
intuitive-edge TCP Intuitive Edge Montgomery Zukowski -
intuitive-edge UDP Intuitive Edge Montgomery Zukowski -

Check what is listening on port 1355

Linux: is anything listening on TCP 1355?
sudo ss -tlnp 'sport = :1355'
Linux: UDP 1355
sudo ss -ulnp 'sport = :1355'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1355
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1355 '
Windows (Command Prompt)
netstat -ano | findstr :1355
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1355 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1355
From Windows
Test-NetConnection HOST -Port 1355
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1355

Block port 1355 in the firewall

ufw
sudo ufw deny 1355/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1355 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1355 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1355' -Direction Inbound -Protocol TCP -LocalPort 1355 -Action Block
ufw
sudo ufw deny 1355/udp
iptables
sudo iptables -A INPUT -p udp --dport 1355 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1355 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1355' -Direction Inbound -Protocol UDP -LocalPort 1355 -Action Block

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