bounce scan failure

[Phani Kumar <phani () lantana tenet res in>]

I am using Red Hat 8 and configured vsftpd on it.

When executing nmap bounce scan, I got the result as:

Host  (10.6.21.1) appears to be up ... good.
Attempting connection to ftp://anonymous:@xxx.xxx.xxx.xxx:21
Connected:220 ready, dude (vsFTPd 1.1.0: beat me, break me)
sent username, received: 331 Please specify the password.
sent password, received: 230 Login successful. Have fun.
Initiating TCP ftp bounce scan against  (10.6.21.1)
result of port query on port 22: 500 Illegal PORT command.
Your ftp bounce server doesn't allow priviliged ports, skipping them. 
Command: PORT 10,6,21,1,0,22

And you didn't want to scan any unpriviliged ports.  Giving up.

But I configured vsftpd to access all the privileged ports. My 
/etc/vsftpd.conf file is shown below:

anonymous_enable=YES

local_enable=YES

local_umask=022

dirmessage_enable=YES

xferlog_enable=YES

connect_from_port_20=YES

xferlog_std_format=YES

pam_service_name=vsftpd

pasv_enable=YES

pasv_promiscuous=YES

pasv_max_port=65500

pasv_min_port=1

I actually have to get positive result from nmap as port 22 of
10.6.21.1 is open. But its not. Can anyone explain why it is?
Should I change any configuration of vsftpd to make nmap get positive 
result on this bounce scan?

I would really be thankful if anyone helped me inthis regard.

Thanking you

Phani Kumar


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