Windows 2003 Serv-u FTP Access Stop (FEAT 211-extension supported CLNT)

Today came across this problem, Google a bit, put it away.

The solution of FTP problem 211-extension supported stop
Windows 2003, the system firewall is turned on, and the security of the system has improved a lot.
However, the following problems may occur with the FTP server that is installed using serv-u:
After the FTP client has successfully logged in, it stops after issuing the feat command:
[R] FEAT
[R] 211-extension supported
[R] CLNT

The spy of the Serv-u Administrator is shown as:
FEAT
211-extension supported
CLNT
MDTM
MDTM Yyyymmddhhmmss[+-tz];filename
SIZE
SITE pswd; EXEC; Set;index; ZONE; CHMOD; MSG
REST STREAM
XCRC Filename;start;end
MODE Z
211 End

————————————————————————————

211-extension supported
CLNT
A lot of people are stuck here.

This means that the client receives only 2 rows. If you turn off the FEAT command in the site properties, you can log on successfully.

If the system firewall is turned off, the FEAT can pass through and eventually appear in the directory list.

How can the server open the firewall, so that the client does not modify settings can also log in.

Workaround: Add the ServUDaemon.exe of the Serv-u directory to the exception and cancel the "FTP server" Check in the firewall's-advanced-local connection settings.
Why do you want to cancel a locally connected FTP server to use the feat command? This is to ask Ms to know, it is estimated that MS does not want users to use non-IIS FTP.