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Port 1775 (vdab)

IANA assigns port 1775 to vdab: data interchange between visual processing containers.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
vdab TCP data interchange between visual processing containers MJA Technology LLC -

Registry dates for this port: registered 2014-04-23.

Check what is listening on port 1775

Linux: is anything listening on TCP 1775?
sudo ss -tlnp 'sport = :1775'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1775
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1775 '
Windows (Command Prompt)
netstat -ano | findstr :1775
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1775 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1775
From Windows
Test-NetConnection HOST -Port 1775

Block port 1775 in the firewall

ufw
sudo ufw deny 1775/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1775 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1775 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1775' -Direction Inbound -Protocol TCP -LocalPort 1775 -Action Block

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