CODEWITHSUNDEEP
c#asp.netasp-classicwebftp
Alan Faz
Alan Faz

Reputation: 140

Force browser to use ACTIVE FTP

I have to download a file from a FTP Server via browser, but the ports on my PASV Data Channel are being blocked by the Firewall.

Is there any way I can force the browser to use ACTIVE FTP?

I have ports 20 and 21 available. I opened my DATAPORTS on [6000-7000] on my IIS Server, but my Firewall wont let anything throu, I have NO Access to the firewall.

Currently, I am just using <a href="ftp://....>File</a>

Upvotes: 1

Views: 956

Answers (1)

user1693593
user1693593

Reputation:

Is there any way I can force the browser to use ACTIVE FTP?

Unfortunately no - it can't be forced if a firewall in the chain blocks it as you need to be able to accept incoming TCP connections. If your firewalls blocks these then there is no help to get.

FTP may run in active or passive mode [...] In active mode, the client creates a TCP control connection to the server and sends the server the client's IP address and an arbitrary client port number, and then waits until the server initiates the data connection over TCP to that client IP address and client port number. In situations where the client is behind a firewall and unable to accept incoming TCP connections, passive mode may be used.

Source: https://en.wikipedia.org/wiki/File_Transfer_Protocol#Communication_and_data_transfer

Upvotes: 1

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