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Port 1533 (virtual-places)

IANA assigns port 1533 to virtual-places: Virtual Places Software.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
virtual-places TCP Virtual Places Software Avshalom Houri -
virtual-places UDP Virtual Places Software Avshalom Houri -

Check what is listening on port 1533

Linux: is anything listening on TCP 1533?
sudo ss -tlnp 'sport = :1533'
Linux: UDP 1533
sudo ss -ulnp 'sport = :1533'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1533
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1533 '
Windows (Command Prompt)
netstat -ano | findstr :1533
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1533 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1533
From Windows
Test-NetConnection HOST -Port 1533
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1533

Block port 1533 in the firewall

ufw
sudo ufw deny 1533/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1533 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1533 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1533' -Direction Inbound -Protocol TCP -LocalPort 1533 -Action Block
ufw
sudo ufw deny 1533/udp
iptables
sudo iptables -A INPUT -p udp --dport 1533 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1533 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1533' -Direction Inbound -Protocol UDP -LocalPort 1533 -Action Block

Related ports

1531rap-listen1532miroconnect1534micromuse-lm1535ampr-info

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