HTTPfy

Port 7728 (osvr)

IANA assigns port 7728 to osvr: Open-Source Virtual Reality.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
osvr TCP Open-Source Virtual Reality Open Source Virtual Reality OSVR.com -
osvr UDP Open-Source Virtual Reality Open Source Virtual Reality OSVR.com -
osvr SCTP Open-Source Virtual Reality Open Source Virtual Reality OSVR.com -

Registry dates for this port: registered 2015-07-14.

Check what is listening on port 7728

Linux: is anything listening on TCP 7728?
sudo ss -tlnp 'sport = :7728'
Linux: UDP 7728
sudo ss -ulnp 'sport = :7728'
Linux / macOS: which process owns the port
sudo lsof -nP -i :7728
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':7728 '
Windows (Command Prompt)
netstat -ano | findstr :7728
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 7728 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 7728
From Windows
Test-NetConnection HOST -Port 7728
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 7728

Block port 7728 in the firewall

ufw
sudo ufw deny 7728/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 7728 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 7728 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 7728' -Direction Inbound -Protocol TCP -LocalPort 7728 -Action Block
ufw
sudo ufw deny 7728/udp
iptables
sudo iptables -A INPUT -p udp --dport 7728 -j DROP
nftables
sudo nft add rule inet filter input udp dport 7728 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 7728' -Direction Inbound -Protocol UDP -LocalPort 7728 -Action Block

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