Port 352 (dtag-ste-sb, bhoedap4)

IANA assigns port 352 to dtag-ste-sb, bhoedap4: DTAG.

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

IANA assignment

Service nameProtoDescriptionAssigneeReference

dtag-ste-sb TCP DTAG
(assigned long ago) Ruediger Wald -

bhoedap4 TCP bhoedap4
This entry records an unassigned but widespread use (added 5/21/97) John Kelly -

dtag-ste-sb UDP DTAG
(assigned long ago) Ruediger Wald -

bhoedap4 UDP bhoedap4
This entry records an unassigned but widespread use (added 5/21/97) John Kelly -

Linux: is anything listening on TCP 352?

sudo ss -tlnp 'sport = :352'

Linux: UDP 352

sudo ss -ulnp 'sport = :352'

Linux / macOS: which process owns the port

sudo lsof -nP -i :352

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':352 '

Windows (Command Prompt)

netstat -ano | findstr :352

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 352 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 352

From Windows

Test-NetConnection HOST -Port 352

UDP probe (no reply does not prove it is closed)

nc -vzu -w 5 HOST 352

ufw

sudo ufw deny 352/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 352 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 352 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 352' -Direction Inbound -Protocol TCP -LocalPort 352 -Action Block

ufw

sudo ufw deny 352/udp

iptables

sudo iptables -A INPUT -p udp --dport 352 -j DROP

nftables

sudo nft add rule inet filter input udp dport 352 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 352' -Direction Inbound -Protocol UDP -LocalPort 352 -Action Block

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