Debian 11，我安装了 Logitech Media Server 与 Squeezebox 播放器一起使用。服务器在本地 IP 地址：192.168.10.xxx 端口 9000 上运行。我在 Squeezebox 播放器上配置了该地址，但它无法连接到媒体服务器。我猜测这可能是由 Debian 上运行的 ufw 防火墙引起的。我检查了 ufw 状态：
sudo ufw status verbose
Status: active
Logging: on (low)
Default: deny (incoming), allow (outgoing), disabled (routed)
New profiles: skip
To Action From
-- ------ ----
23/tcp ALLOW IN Anywhere
23/tcp (v6) ALLOW IN Anywhere (v6)
我为 ufw 防火墙设置了规则，但这没有帮助：
sudo ufw allow from 192.168.10.103 to any port 9000
这是罗技媒体服务器日志文件：
[23-07-29 22:07:20.5102] main::init (377) Starting Logitech Media Server (v8.3.1, 1676361197, Fri 17 Feb 2023 06:37:09 AM CET) perl 5.032001 - x86_64-linux-gnu-thread-multi
[23-07-29 22:07:20.5261] Slim::Utils::IPDetect::_init (138) Warning: Couldn't call connect() - falling back to 127.0.0.1
[23-07-29 22:07:25.6148] main::checkDataSource (1107) Warning: Schema updated or no media found in the database, initiating scan.
[23-07-29 22:07:25.6617] Slim::Utils::Misc::msg (1325) Warning: [22:07:25.6613] EV: error in callback (ignoring): pack_sockaddr: invalid host at /usr/share/squeezeboxserver/lib/AnyEvent/DNS.pm line 1114.
[23-07-29 22:07:25.6621] Slim::Utils::Misc::msg (1325) Warning: [22:07:25.6619] EV: error in callback (ignoring): pack_sockaddr: invalid host at /usr/share/squeezeboxserver/lib/AnyEvent/DNS.pm line 1114.
[23-07-29 22:07:27.6621] Slim::Utils::Misc::msg (1325) Warning: [22:07:27.6619] EV: error in callback (ignoring): pack_sockaddr: invalid host at /usr/share/squeezeboxserver/lib/AnyEvent/DNS.pm line 1114.
[23-07-29 22:07:31.0260] Slim::Plugin::FullTextSearch::Plugin::_initPopularTerms (592) Fulltext index missing or outdated - re-building
[23-07-29 22:07:32.6627] Slim::Utils::Misc::msg (1325) Warning: [22:07:32.6624] EV: error in callback (ignoring): pack_sockaddr: invalid host at /usr/share/squeezeboxserver/lib/AnyEvent/DNS.pm line 1114.
[23-07-29 22:07:32.6632] Slim::Utils::Misc::msg (1325) Warning: [22:07:32.6630] EV: error in callback (ignoring): pack_sockaddr: invalid host at /usr/share/squeezeboxserver/lib/AnyEvent/DNS.pm line 1114.
[23-07-29 22:07:34.6632] Slim::Utils::Misc::msg (1325) Warning: [22:07:34.6630] EV: error in callback (ignoring): pack_sockaddr: invalid host at /usr/share/squeezeboxserver/lib/AnyEvent/DNS.pm line 1114.
[23-07-29 22:07:42.6642] Slim::Utils::Misc::msg (1325) Warning: [22:07:42.6637] EV: error in callback (ignoring): pack_sockaddr: invalid host at /usr/share/squeezeboxserver/lib/AnyEvent/DNS.pm line 1114.
[23-07-29 22:07:42.6649] Slim::Utils::Misc::msg (1325) Warning: [22:07:42.6646] EV: error in callback (ignoring): pack_sockaddr: invalid host at /usr/share/squeezeboxserver/lib/AnyEvent/DNS.pm line 1114.
[23-07-29 22:07:44.6649] Slim::Utils::Misc::msg (1325) Warning: [22:07:44.6645] EV: error in callback (ignoring): pack_sockaddr: invalid host at /usr/share/squeezeboxserver/lib/AnyEvent/DNS.pm line 1114.
[23-07-29 22:07:47.6646] Slim::Networking::Repositories::__ANON__ (147) Failed to fetch https://github.com/LMS-Community/lms-plugin-repository/raw/master/extensions.xml: Couldn't resolve IP address for: github.com
[23-07-29 22:07:47.6656] Slim::Formats::XML::gotErrorViaHTTP (343) Error: getting https://www.mysqueezebox.com/api/sounds/v1/opml
Couldn't resolve IP address for: www.mysqueezebox.com
[23-07-29 22:07:47.6659] Slim::Plugin::Sounds::Plugin::_gotSoundsError (82) Error: Unable to cache Sounds & Effects menu from SN: Couldn't resolve IP address for: www.mysqueezebox.com
[23-07-29 22:07:49.6653] Slim::Formats::XML::gotErrorViaHTTP (343) Error: getting http://opml.radiotime.com/Index.aspx?partnerId=16
Couldn't resolve IP address for: opml.radiotime.com
[23-07-29 22:07:49.6656] Slim::Plugin::InternetRadio::Plugin::_gotRadioError (71) Unable to retrieve radio directory from SN: Couldn't resolve IP address for: opml.radiotime.com
[23-07-29 22:11:25.0107] Slim::Plugin::FullTextSearch::Plugin::_initPopularTerms (592) Fulltext index missing or outdated - re-building
[23-07-29 22:22:18.4412] Slim::Plugin::FullTextSearch::Plugin::_initPopularTerms (592) Fulltext index missing or outdated - re-building
[23-07-29 23:11:40.4945] Slim::Networking::SqueezeNetwork::Players::_disconnect_player_error (457) Disconnect SN player error: 403 Forbidden
[23-07-29 23:17:07.9891] Slim::Networking::SqueezeNetwork::Players::_disconnect_player_error (457) Disconnect SN player error: 403 Forbidden
[23-07-29 23:17:48.4542] Slim::Networking::SqueezeNetwork::Players::_disconnect_player_error (457) Disconnect SN player error: 403 Forbidden
[23-07-30 00:51:13.7244] Slim::Networking::SqueezeNetwork::_error (421) Unable to login to SN: Timed out waiting for data
[23-07-30 00:51:13.7247] Slim::Networking::SqueezeNetwork::_init_error (145) Unable to login to mysqueezebox.com, sync is disabled: Timed out waiting for data
[23-07-30 00:51:13.7253] Slim::Networking::SqueezeNetwork::_init_error (161) will retry in 300 (https://www.mysqueezebox.com)
[23-07-30 00:51:44.0230] Slim::Networking::SqueezeNetwork::_error (421) Unable to login to SN: Timed out waiting for data
[23-07-30 00:51:44.0234] Slim::Networking::SqueezeNetwork::_init_error (145) Unable to login to mysqueezebox.com, sync is disabled: Timed out waiting for data
[23-07-30 00:51:44.0239] Slim::Networking::SqueezeNetwork::_init_error (161) will retry in 600 (https://www.mysqueezebox.com)
[23-07-30 00:56:23.0746] Slim::Utils::Timers::__ANON__ (272) Error: Timer Slim::Networking::SqueezeNetwork::__ANON__ failed:
[23-07-30 01:25:29.7941] Slim::Networking::SqueezeNetwork::Players::_disconnect_player_error (457) Disconnect SN player error: 403 Forbidden
[23-07-30 03:06:00.8745] Slim::Networking::SqueezeNetwork::_error (421) Unable to login to SN: Invalid mysqueezebox.com username or password.
所以，答案是：允许传入连接到这些端口：
sudo ufw allow from IP_OF_YOUR_SQUEEZEBOX proto tcp to any port 9000,9090,3483