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Port 3405 (nokia-ann-ch1)

IANA assigns port 3405 to nokia-ann-ch1: Nokia Announcement ch 1.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
nokia-ann-ch1 TCP Nokia Announcement ch 1 - -
nokia-ann-ch1 UDP Nokia Announcement ch 1 - -

Check what is listening on port 3405

Linux: is anything listening on TCP 3405?
sudo ss -tlnp 'sport = :3405'
Linux: UDP 3405
sudo ss -ulnp 'sport = :3405'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3405
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3405 '
Windows (Command Prompt)
netstat -ano | findstr :3405
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3405 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3405
From Windows
Test-NetConnection HOST -Port 3405
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3405

Block port 3405 in the firewall

ufw
sudo ufw deny 3405/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3405 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3405 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3405' -Direction Inbound -Protocol TCP -LocalPort 3405 -Action Block
ufw
sudo ufw deny 3405/udp
iptables
sudo iptables -A INPUT -p udp --dport 3405 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3405 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3405' -Direction Inbound -Protocol UDP -LocalPort 3405 -Action Block

Related ports

3401filecast3402fxaengine-net3406nokia-ann-ch23407ldap-admin

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