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Port 13786 (nomdb)

IANA assigns port 13786 to nomdb: Veritas-nomdb.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
nomdb TCP Veritas-nomdb Clayton Haapala -
nomdb UDP Veritas-nomdb Clayton Haapala -

Registry dates for this port: registered 2005-08.

Check what is listening on port 13786

Linux: is anything listening on TCP 13786?
sudo ss -tlnp 'sport = :13786'
Linux: UDP 13786
sudo ss -ulnp 'sport = :13786'
Linux / macOS: which process owns the port
sudo lsof -nP -i :13786
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':13786 '
Windows (Command Prompt)
netstat -ano | findstr :13786
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 13786 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 13786
From Windows
Test-NetConnection HOST -Port 13786
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 13786

Block port 13786 in the firewall

ufw
sudo ufw deny 13786/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 13786 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 13786 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 13786' -Direction Inbound -Protocol TCP -LocalPort 13786 -Action Block
ufw
sudo ufw deny 13786/udp
iptables
sudo iptables -A INPUT -p udp --dport 13786 -j DROP
nftables
sudo nft add rule inet filter input udp dport 13786 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 13786' -Direction Inbound -Protocol UDP -LocalPort 13786 -Action Block

Related ports

13783vopied13785nbdb13818dsmcc-config13819dsmcc-session

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