421 Too many users - please try again later.

Serv-U架设的FTP服务器,用户连接老是失败,提示信息:

引用内容 引用内容
FlashFXP v3.3.5 build 1110

WinSock 2.0
[右] 正在连接到 218.66.104.157 -> IP=218.66.104.157 PORT=21
[右] 已连接到 218.66.104.157
[右] 220 Serv-U FTP Server v6.4 for WinSock ready...
[右] USER editor001
[右] 421 Too many users - please try again later.
[右] 连接失败
[右] 正在延迟 120 秒, 之后将尝试第 1 次重新连接
[右] 正在连接到 218.66.104.157 -> IP=218.66.104.157 PORT=21 (尝试 # 1)
[右] 已连接到 218.66.104.157
[右] 220 Serv-U FTP Server v6.4 for WinSock ready...
[右] USER editor001
[右] 421 Too many users - please try again later.
[右] 连接失败
[右] 正在延迟 120 秒, 之后将尝试第 2 次重新连接
[右] 正在连接到 218.66.104.157 -> IP=218.66.104.157 PORT=21 (尝试 # 2)
[右] 已连接到 218.66.104.157
[右] 220 Serv-U FTP Server v6.4 for WinSock ready...
[右] USER editor001
[右] 421 Too many users - please try again later.
[右] 连接失败
[右] 正在延迟 120 秒, 之后将尝试第 3 次重新连接
[右] 正在连接到 218.66.104.157 -> IP=218.66.104.157 PORT=21 (尝试 # 3)
[右] 已连接到 218.66.104.157
[右] 220 Serv-U FTP Server v6.4 for WinSock ready...
[右] USER editor001
[右] 421 Too many users - please try again later.
[右] 连接失败

最终发现原因是Serv-U测试期已经结束,被自动切换成了“个人版”,有诸多限制:



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