FTP-Proxy swallows 221 Message (MS FTP-Service)

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From: smartTERRA NOC
Date: Wednesday, April 2, 2008 - 4:18 am

Hello,

I'm running 4.2 GENERIC#642 i386 and uses pf and ftp-proxy for a  
firewall service. I noticed that ftp connections, established with the  
help of ftp-proxy, don't receive the "221 Goodbye" Message from the  
FTP-Server.

#:~ falk$ telnet 192.168.30.22 21
Trying 192.168.30.22...
Connected to 192.168.30.22.
Escape character is '^]'.
220 Microsoft FTP Service
USER anonymous
331 Anonymous access allowed, send identity (e-mail name) as password.
PASS test@test.test
230 Anonymous user logged in.
QUIT
Connection closed by foreign host.

A direct connection to the host ends with these additional line:

QUIT
221
Connection closed by foreign host.

Hm, another test points me to the direction that Microsoft sucks.  
Other FTP-Servers close the connection with "221 Goodbye." which ftp- 
proxy don't swallow - as expected.

Can anyone confirm this behavior? Is there a workaround to forgive MS  
FTP Servers the lack of text in the 221 Status message?

Regards,

Falk

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