Topic: Error connecting to the FTP site

[banana_boat30]

Hi Folks,

I am having trouble to figure out how to modify the squid config, so it can access FTP server from the client machine.
Currently, we're running SME Server 7.4 behind a firewall, SME server in server-mode only. Port 21 is open for outgoing traffic. However, we receive this error below upon typing the FTP details from the web browser:

An FTP protocol error occurred while trying to retrieve the URL: ftp://xxx.xxx.xxx.xxx/blabla

Squid sent the following FTP command:

    Connect to server

and then received this reply

I have checked using other internet connection and the FTP server is actually up and running, only happens to user who is behind this SME server.

Do you have any suggestion?

[mmccarn]

Try changing the FTP "mode" on one of your workstations - if you're currently set to use "active", change to "passive"; if you're using "passive", change to "active".

Read more here: http://www.ncftp.com/ncftpd/doc/misc/ftp_and_firewalls.html#TwoTypes

[banana_boat30]

Hi mmccarn,

I have tried using the FTP client and tried changing the active and passive mode but no luck.

I had browse around and found something that we had to add in the squid.conf:

acl ftp proto FTP
http_access allow ftp

Do you think this is necessary?

Thanks for trying to help.

[mmccarn]

I've never needed to do anything with squid on a SME to get outbound FTP connections to work; have you done something unusual that gets squid involved in your FTP connections?

I found this post discussing using squid to proxy ftp connections, and mentioning that you may need to add your username to the FTP URL (to keep Squid from trying a different/wrong user name on its own): http://nixcraft.com/linux-software/384-ftp-through-squid.html