Port 2525 (ms-v-worlds)

IANA assigns port 2525 to ms-v-worlds: MS V-Worlds.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

ms-v-worlds TCP MS V-Worlds Pete Wong -

ms-v-worlds UDP MS V-Worlds Pete Wong -

Linux: is anything listening on TCP 2525?

sudo ss -tlnp 'sport = :2525'

Linux: UDP 2525

sudo ss -ulnp 'sport = :2525'

Linux / macOS: which process owns the port

sudo lsof -nP -i :2525

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':2525 '

Windows (Command Prompt)

netstat -ano | findstr :2525

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2525 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 2525

From Windows

Test-NetConnection HOST -Port 2525

UDP probe (no reply does not prove it is closed)

nc -vzu -w 5 HOST 2525

ufw

sudo ufw deny 2525/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 2525 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 2525 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 2525' -Direction Inbound -Protocol TCP -LocalPort 2525 -Action Block

ufw

sudo ufw deny 2525/udp

iptables

sudo iptables -A INPUT -p udp --dport 2525 -j DROP

nftables

sudo nft add rule inet filter input udp dport 2525 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 2525' -Direction Inbound -Protocol UDP -LocalPort 2525 -Action Block

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