Proftpd behind NAT

[adigit]

hi all,

can someone tell me why the Proftpd server will terminate my connection when smartftp trying to enter Passive Mode?

then after around 30s. it prompts below:

Quote:Automatic failover of data connection mode from "Passive Mode (PASV)" to "Active Mode (PORT)".

Is it because my server is behind NAT? how to solve this problem, please?

[BeNe]

What about the proftpd logs ?
Does this also happens with other FTP-Clients ?

[joximu]

Your NAT Router should be able to hande the FTP passive mode (which is not that easy).

NAT is not recommended. Especially not for FTP server...

[adigit]

Quote:What about the proftpd logs ?
Does this also happens with other FTP-Clients ?

nothing logged
haven't tried other ftp-clients.

Quote:Your NAT Router should be able to hande the FTP passive mode (which is not that easy).

NAT is not recommended. Especially not for FTP server...

coz I created more than 1 virtual private server inside 1 server hardware with openVZ.

someone has ideas about captioned problem?