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Port 413 (smsp)

IANA assigns port 413 to smsp: Storage Management Services Protocol.

Well-known (system) port, 0-1023 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
smsp TCP Storage Management Services Protocol Murthy Srinivas -
smsp UDP Storage Management Services Protocol Murthy Srinivas -

Check what is listening on port 413

Linux: is anything listening on TCP 413?
sudo ss -tlnp 'sport = :413'
Linux: UDP 413
sudo ss -ulnp 'sport = :413'
Linux / macOS: which process owns the port
sudo lsof -nP -i :413
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':413 '
Windows (Command Prompt)
netstat -ano | findstr :413
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 413 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 413
From Windows
Test-NetConnection HOST -Port 413
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 413

Block port 413 in the firewall

ufw
sudo ufw deny 413/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 413 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 413 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 413' -Direction Inbound -Protocol TCP -LocalPort 413 -Action Block
ufw
sudo ufw deny 413/udp
iptables
sudo iptables -A INPUT -p udp --dport 413 -j DROP
nftables
sudo nft add rule inet filter input udp dport 413 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 413' -Direction Inbound -Protocol UDP -LocalPort 413 -Action Block

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