Nmap Development mailing list archives

Re: FTP over NCAT


From: nnposter <nnposter () users sourceforge net>
Date: Wed, 9 Jan 2019 13:46:47 -0700

FTP and SFTP are principally different protocols so using a client for one to really talk the other is not going to work.

Secondarily, FTP is a complex protocol that involves secondary TCP connections (data channels) managed through a primary TCP connection (control channel). Because of this complexity, the protocol is not well suited for traversing simple TCP proxies.

Cheers,
nnposter


On 1/5/19 6:43 PM, Siva wrote:
NMAP team
  Could u please advice syntax for using ncat to use proxy to download files from a external ftp host ?

While the following is working for destinations on port 22 - sftp, i am unable to reach a ftp destination using this syntax.

Could you please advice ?

sftp -v -oPort=21 "ProxyCommand=/usr/bin/ncat -v --proxy $proxy_server --proxy-type socks5 --proxy-auth $proxy_user:$proxy_pwd %h %p" $ftp_user@$ftp_host

Regards
Siva

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