Port 10000 (Webmin)

Webmin/Virtualmin web admin panel; also the start of the usual RTP media range in Asterisk (10000-20000).

Registered (user) port, 1024-49151 TCP Remote access Expose only to trusted sources

What port 10000 is used for

Webmin/Virtualmin web admin panel; also the start of the usual RTP media range in Asterisk (10000-20000).

Security: should port 10000 be open?

Expose only to trusted sources. Webmin runs as root; a backdoored release (CVE-2019-15107) and other RCEs were mass-exploited. Restrict to admin IPs or a VPN.

IANA assignment

Service nameProtoDescriptionAssigneeReference

ndmp TCP Network Data Management Protocol Brian Ehrmantraut -

ndmp UDP Network Data Management Protocol Brian Ehrmantraut -

Check what is listening on port 10000

Linux: is anything listening on TCP 10000?

sudo ss -tlnp 'sport = :10000'

Linux / macOS: which process owns the port

sudo lsof -nP -i :10000

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':10000 '

Windows (Command Prompt)

netstat -ano | findstr :10000

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 10000 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine

nc -vz -w 5 HOST 10000

From Windows

Test-NetConnection HOST -Port 10000

Allow only trusted sources on port 10000 in the firewall

Replace 203.0.113.10 with the address or network you trust. With ufw, make sure the default incoming policy is deny.

ufw (one trusted source)

sudo ufw allow from 203.0.113.10 to any port 10000 proto tcp

iptables

sudo iptables -A INPUT -p tcp --dport 10000 -s 203.0.113.10 -j ACCEPT
sudo iptables -A INPUT -p tcp --dport 10000 -j DROP

nftables

sudo nft add rule inet filter input ip saddr 203.0.113.10 tcp dport 10000 accept
sudo nft add rule inet filter input tcp dport 10000 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'TCP 10000 trusted' -Direction Inbound -Protocol TCP -LocalPort 10000 -RemoteAddress 203.0.113.10 -Action Allow

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