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Port 35356 (guttersnex)

IANA assigns port 35356 to guttersnex: Gutters Note Exchange.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
guttersnex TCP Gutters Note Exchange Squee Application Development -

Registry dates for this port: registered 2011-07-19.

Check what is listening on port 35356

Linux: is anything listening on TCP 35356?
sudo ss -tlnp 'sport = :35356'
Linux / macOS: which process owns the port
sudo lsof -nP -i :35356
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':35356 '
Windows (Command Prompt)
netstat -ano | findstr :35356
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 35356 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 35356
From Windows
Test-NetConnection HOST -Port 35356

Block port 35356 in the firewall

ufw
sudo ufw deny 35356/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 35356 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 35356 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 35356' -Direction Inbound -Protocol TCP -LocalPort 35356 -Action Block

Related ports

35354kitim35355altova-lm, altova-lm-disc35357openstack-id36001allpeers

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