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Port 5413 (wwiotalk)

IANA assigns port 5413 to wwiotalk: WWIOTALK.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
wwiotalk TCP WWIOTALK Roger Knobbe -
wwiotalk UDP WWIOTALK Roger Knobbe -

Check what is listening on port 5413

Linux: is anything listening on TCP 5413?
sudo ss -tlnp 'sport = :5413'
Linux: UDP 5413
sudo ss -ulnp 'sport = :5413'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5413
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5413 '
Windows (Command Prompt)
netstat -ano | findstr :5413
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5413 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5413
From Windows
Test-NetConnection HOST -Port 5413
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5413

Block port 5413 in the firewall

ufw
sudo ufw deny 5413/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5413 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5413 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5413' -Direction Inbound -Protocol TCP -LocalPort 5413 -Action Block
ufw
sudo ufw deny 5413/udp
iptables
sudo iptables -A INPUT -p udp --dport 5413 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5413 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5413' -Direction Inbound -Protocol UDP -LocalPort 5413 -Action Block

Related ports

5411actnet5412continuus5414statusd5415ns-server

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