Peers, Trackers and DNS in libtorrent’s Proxy Settings
Set a modern libtorrent proxy through settings_pack and inspect peer, tracker and hostname coverage as separate settings.
For the documented libtorrent 2.1 settings interface, configure the session with a settings_pack rather than combining several historical set_proxy methods.
| Setting | Purpose |
|---|---|
| proxy_type | Select a supported proxy protocol |
| proxy_hostname, proxy_port | Select the intermediary |
| proxy_username, proxy_password | Supply its account when required |
| proxy_peer_connections | Route peer payload connections, including web seeds |
| proxy_tracker_connections | Route tracker connections |
| proxy_hostnames | Resolve destination names through a supported proxy |
Fill the pack and apply it through the session's apply_settings interface. For hostname proxying, the reference documents support with SOCKS5 and HTTP. Check the selected protocol against the traffic needed by the application. When choosing a public SOCKS5 endpoint, use the SOCKS5 proxy list as a starting point, then establish which peer and tracker connections that endpoint actually permits.
The old force_proxy advice is version-specific. The project's 1.2 changelog deprecated that setting because a configured proxy is always used for the covered traffic. Its presence in an old binding example does not establish a current requirement.
Monitor connection and tracker failures through the application's alert handling. Review peer, tracker and DNS behavior separately; a successful tracker response alone is not a result for the peer payload route.