再次，我只是不明白为什么我会收到此消息，当我尝试通过我的 wan 地址（112.135.26.115）连接我的 ftp 服务器时，它说 530 用户访问被拒绝
但当我把同样的数据给http://ftptest.net结果如下...
Status: Resolving address of 112.135.26.115
Status: Connecting to 112.135.26.115
Status: Connected, waiting for welcome message
Reply: 220-FileZilla Server version 0.9.34 beta
Reply: 220-written by Tim Kosse ([email protected])
Reply: 220 Please visit http://sourceforge.net/projects/filezilla/
Status: CLNT http://ftptest.net on behalf of 112.135.26.115
Reply: 200 Don't care
Status: USER saravana
Reply: 331 Password required for saravana
Status: PASS *********
Reply: 230 Logged on
Status: SYST
Reply: 215 UNIX emulated by FileZilla
Status: FEAT
Reply: 211-Features:
Reply: MDTM
Reply: REST STREAM
Reply: SIZE
Reply: MLST type*;size*;modify*;
Reply: MLSD
Reply: AUTH SSL
Reply: AUTH TLS
Reply: UTF8
Reply: CLNT
Reply: MFMT
Reply: 211 End
Status: PWD
Reply: 257 "/" is current directory.
Status: Current path is /
Status: TYPE I
Reply: 200 Type set to I
Status: PASV
Reply: 227 Entering Passive Mode (112,135,26,115,43,9)
Status: MLSD
Reply: 150 Connection accepted
Listing: type=dir;modify=20100322113235; it_is_working!_Andrejs_Cainikovs_from_serverfault.com
Listing: type=file;modify=20100322110559;size=5; New Text Document.txt
Reply: 226 Transfer OK
Status: Success
谁能告诉我为什么会发生这种情况？求求你，我整天都在努力！！
这是我通过 filezilla 客户端本地访问的日志
Status: Connecting to 127`enter code here`.0.0.1:21...
Status: Connection established, waiting for welcome message...
Response: 220-FileZilla Server version 0.9.34 beta
Response: 220-written by Tim Kosse ([email protected])
Response: 220 Please visit http://sourceforge.net/projects/filezilla/
Command: USER saravana
Response: 331 Password required for saravana
Command: PASS **********
Response: 230 Logged on
Command: SYST
Response: 215 UNIX emulated by FileZilla
Command: FEAT
Response: 211-Features:
Response: MDTM
Response: REST STREAM
Response: SIZE
Response: MLST type*;size*;modify*;
Response: MLSD
Response: UTF8
Response: CLNT`enter code here`
Response: MFMT
Response: 211 End
Status: Connected
Status: Retrieving directory listing...
Command: PWD
Response: 257 "/" is current directory.
Command: TYPE I
Response: 200 Type set to I
Command: PASV
Response: 227 Entering Passive Mode (127,0,0,1,43,10)
Command: MLSD
Response: 150 Connection accepted
Response: 226 Transfer OK
Status: Directory listing successful
答案1
FTP 服务器是否通过 NAT 转换为公用 IP 地址？如果是这样，请在 LAN 上尝试从内部 IP 地址连接到它。许多防火墙会阻止从防火墙传出的流量返回。因此，如果 FTP 服务器有一个内部地址，而防火墙将其转换为公用 IP 地址，则 ftptest.org 测试将正常工作，因为它完全在防火墙之外，但是，您的 PC 可能无法正常工作，因为它试图离开网络以访问公用 IP 地址，然后通过 NAT 路由返回。转到内部 IP 地址可以解决此问题。
答案2
我的第一个猜测是你没有像测试输出那样使用被动模式。我的第二个猜测是防火墙上的规则不允许主动或被动模式下的 ftp 通过。