我正在尝试连接到 irc.mozilla.org 和 freenode，并在 weechat IRC 客户端上收到以下消息。
14:17:07 weechat | irc: server mozilla created
14:17:15 mozilla | irc: connecting to server irc.mozilla.org/6697...
14:17:16 mozilla | irc: connected to irc.mozilla.org/6697 (63.245.216.214)
14:17:16 mozilla =!= | irc: reading data on socket: error 104 Connection reset by peer
14:17:16 mozilla | irc: disconnecting from server...
14:17:16 mozilla | irc: disconnected from server
14:17:16 mozilla | irc: reconnecting to server in 10 seconds
14:17:26 mozilla | irc: reconnecting to server...
14:17:26 mozilla | irc: connecting to server irc.mozilla.org/6697...
14:17:26 mozilla | irc: connected to irc.mozilla.org/6697 (63.245.216.214)
14:17:26 mozilla =!= | irc: reading data on socket: error 104 Connection reset by peer
14:17:26 mozilla | irc: disconnecting from server...
14:17:26 mozilla | irc: disconnected from server
14:17:26 mozilla | irc: reconnecting to server in 20 seconds
14:17:46 mozilla | irc: reconnecting to server...
14:17:46 mozilla | irc: connecting to server irc.mozilla.org/6697...
14:17:46 mozilla | irc: connected to irc.mozilla.org/6697 (63.245.216.214)
14:17:46 mozilla =!= | irc: reading data on socket: error 104 Connection reset by peer
14:17:46 mozilla | irc: disconnecting from server...
14:17:46 mozilla | irc: disconnected from server
14:17:46 mozilla | irc: reconnecting to server in 40 seconds
14:18:26 mozilla | irc: reconnecting to server...
14:18:26 mozilla | irc: connecting to server irc.mozilla.org/6697...
14:18:26 mozilla | irc: connected to irc.mozilla.org/6697 (63.245.216.214)
14:18:26 mozilla =!= | irc: reading data on socket: error 104 Connection reset by peer
14:18:26 mozilla | irc: disconnecting from server...
14:18:26 mozilla | irc: disconnected from server
14:18:26 mozilla | irc: reconnecting to server in 1 minute, 20 seconds
14:19:14 weechat | irc: server oftc created
14:19:19 oftc | irc: connecting to server irc.oftc.net/6667...
14:19:36 freenode === | ========== End of backlog (5 lines) ==========
14:19:36 freenode | irc: connecting to server chat.freenode.net/7000...
14:19:46 mozilla | irc: reconnecting to server...
14:19:46 mozilla | irc: connecting to server irc.mozilla.org/6697...
14:19:46 mozilla | irc: connected to irc.mozilla.org/6697 (63.245.216.214)
14:19:46 mozilla =!= | irc: reading data on socket: error 104 Connection reset by peer
14:19:46 mozilla | irc: disconnecting from server...
14:19:46 mozilla | irc: disconnected from server
14:19:46 mozilla | irc: reconnecting to server in 2 minutes, 40 seconds
它说连接重置。如果它被拒绝，我可能认为它被阻止了。但它在连接后被重置，发生了什么？数据包过滤？
如何测试我的学校是否阻止 IRC 客户端连接到 IRC 服务器？我是 Linux（Ubuntu）用户。