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Port 354 (bh611)

IANA assigns port 354 to bh611.

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

IANA assignment

Service nameProtoDescriptionAssigneeReference
bh611 TCP bh611 John Kelly -
bh611 UDP bh611 John Kelly -

Check what is listening on port 354

Linux: is anything listening on TCP 354?
sudo ss -tlnp 'sport = :354'
Linux: UDP 354
sudo ss -ulnp 'sport = :354'
Linux / macOS: which process owns the port
sudo lsof -nP -i :354
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':354 '
Windows (Command Prompt)
netstat -ano | findstr :354
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 354 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 354
From Windows
Test-NetConnection HOST -Port 354
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 354

Block port 354 in the firewall

ufw
sudo ufw deny 354/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 354 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 354 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 354' -Direction Inbound -Protocol TCP -LocalPort 354 -Action Block
ufw
sudo ufw deny 354/udp
iptables
sudo iptables -A INPUT -p udp --dport 354 -j DROP
nftables
sudo nft add rule inet filter input udp dport 354 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 354' -Direction Inbound -Protocol UDP -LocalPort 354 -Action Block

Related ports

352dtag-ste-sb, bhoedap4353ndsauth355datex-asn356cloanto-net-1

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