We are using both kerberos and basic authentication mode. I am now able to connect to FTP site through filezilla by allowing FTP port with CONNECT method but unable to view directory listings. below are both errors. Filezilla Error; 150. Opening binary mode data connection. error. connection timed out access.log; 1395127370.117 20775 10.25.40.121 TCP_MISS/000 0 CONNECT 115.186.92.227:58682 - NONE/- - [Host: 115.186.92.227:58682\r\nProxy-Authorization: Basic c2FyZnJhei5hc2xhbUBtY2IuY29tLnBrOlJSb290QEREb21haW4=\r\nUser-Agent: FileZilla\r\n] [] 1395127370.117 22121 10.25.40.121 TCP_MISS/200 395 CONNECT 115.186.92.227:21 - DIRECT/115.186.92.227 - [Host: 115.186.92.227:21\r\nProxy-Authorization: Basic c2FyZnJhei5hc2xhbUBtY2IuY29tLnBrOlJSb290QEREb21haW4=\r\nUser-Agent: FileZilla\r\n] [] Sarfraz ----- Original Message ----- From: Amos Jeffries <squid3@xxxxxxxxxxxxx> To: squid-users@xxxxxxxxxxxxxxx Cc: Sent: Tuesday, March 18, 2014 12:24 PM Subject: Re: FTP not connected through Squid On 18/03/2014 8:09 p.m., ***some text missing*** wrote: > I am getting this error in access.log. > > HTTP/1.0 407 Proxy Authentication Required > Proxy-Authenticate: Negotiate FileZilla does not support Kerberos authentication. http://trac.filezilla-project.org/ticket/8691 Amos