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Port 12006 (dbisamserver2)

IANA assigns port 12006 to dbisamserver2: DBISAM Database Server - Admin.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
dbisamserver2 TCP DBISAM Database Server - Admin Tim Young -
dbisamserver2 UDP DBISAM Database Server - Admin Tim Young -

Registry dates for this port: registered 2002-05.

Check what is listening on port 12006

Linux: is anything listening on TCP 12006?
sudo ss -tlnp 'sport = :12006'
Linux: UDP 12006
sudo ss -ulnp 'sport = :12006'
Linux / macOS: which process owns the port
sudo lsof -nP -i :12006
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':12006 '
Windows (Command Prompt)
netstat -ano | findstr :12006
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 12006 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 12006
From Windows
Test-NetConnection HOST -Port 12006
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 12006

Block port 12006 in the firewall

ufw
sudo ufw deny 12006/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 12006 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 12006 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 12006' -Direction Inbound -Protocol TCP -LocalPort 12006 -Action Block
ufw
sudo ufw deny 12006/udp
iptables
sudo iptables -A INPUT -p udp --dport 12006 -j DROP
nftables
sudo nft add rule inet filter input udp dport 12006 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 12006' -Direction Inbound -Protocol UDP -LocalPort 12006 -Action Block

Related ports

12004entextlow12005dbisamserver112007accuracer12008accuracer-dbms

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