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Port 30100 (rwp)

IANA assigns port 30100 to rwp: Remote Window Protocol.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
rwp TCP Remote Window Protocol Maxim Baklanovsky -
rwp SCTP Remote Window Protocol Maxim Baklanovsky -

Registry dates for this port: registered 2015-05-20.

Check what is listening on port 30100

Linux: is anything listening on TCP 30100?
sudo ss -tlnp 'sport = :30100'
Linux / macOS: which process owns the port
sudo lsof -nP -i :30100
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':30100 '
Windows (Command Prompt)
netstat -ano | findstr :30100
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 30100 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 30100
From Windows
Test-NetConnection HOST -Port 30100

Block port 30100 in the firewall

ufw
sudo ufw deny 30100/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 30100 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 30100 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 30100' -Direction Inbound -Protocol TCP -LocalPort 30100 -Action Block

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