Have public IP, also set up the port mapping, the domain name also points to the public IP, why can configure FTP server network access, network not? (in the Intranet, using IP network and public network IP can access, domain names can not access; Outside net public IP and domain name can't access,) (the two routers to the wan IP address and domain name to IP. 后两张分别是内网访问成功和外网访问失败)

CodePudding user response:

Possible operators to block, the outer net see 21 port is open, if blocked, change the port,

CodePudding user response:

Map the target port to try, if can be filtering operator

CodePudding user response:

There is only one port is 21

CodePudding user response:

FTP to consider 20 and 21 port

CodePudding user response:

The FTP port

CodePudding user response:

Try opening 20, 21 port

CodePudding user response:

Home broadband will be the default block 20/21 port, so to change port mapping, (even open only 21, can only see can't pass up and down, because the associated port, 20)

Specific see clear FTP port side need to set the FTP server, FTP passive connection port, the port need to be mapped out