How do I tell Squid to use a specific username for FTP urls?
Insert your username in the host part of the URL, for example: ftp://joecool@ftp.foo.org/ Squid should then prompt you for your account password. Alternatively, you can specify both your username and password in the URL itself: ftp://joecool:secret@ftp.foo.org/ However, we certainly do not recommend this, as it could be very easy for someone to see or grab your password.
