qBittorrent Firewalled: incoming-connection checklist
Prepared by NAT Checker. Source review: 2026-10-03.
Guide: https://natchecker.com/blog/qbittorrent-connection-status-firewalled

Before changing settings
[ ] Run a well-seeded legal torrent with qBittorrent open.
[ ] Record qBittorrent's incoming listening port: __________
[ ] Record the intended route: ISP / VPN / VPN container
[ ] Verify the public IP of that route: __________
[ ] With a VPN, record the current active forwarded port: __________
[ ] Keep the Web UI management port separate and private.

Check the actual path
[ ] Compare the VPN forwarded port and qBittorrent listening port.
[ ] Verify the listener uses the intended interface / namespace.
[ ] Check the relevant host firewall rule and active network profile.
[ ] Run an external TCP test against the correct public IP and port.
[ ] Check the Peers tab for an incoming I flag during activity.

After reconnecting
[ ] Recheck the current VPN port lease, even if the number is unchanged.
[ ] Update qBittorrent if the assigned port changed.
[ ] For containers, verify the current shared VPN namespace.
[ ] Repeat the incoming-connection check.

Interpretation
Working downloads/uploads establish some outbound connectivity.
A green status means an incoming connection has been observed.
A closed TCP test does not identify the blocking device or test UDP.
Matching port numbers do not prove a working or active forwarding lease.
Port forwarding cannot create seeds or guarantee download speed.
Use a targeted app/port firewall rule; keep the firewall enabled.