PHP ftp_nlist() - timeout - php

Question

I have strange problem: I can connect to ftp server, create directory but I can not get a list of files in directory.
What could be wrong?
Facts:
Server is behind firewall
Yes, I use passive mode, as you can see from code
PHP script is on the same server where FTP server is located
I can access FTP from my desktop using FTP client, and everything works normal, I can create/upload and read contents of directories.
ftp_pwd() and ftp_mkdir() work fast, ftp_nlist() and ftp_rawlist() wait for time-out specified in ftp_connect() (10 seconds in example case)
In active mode - almost the same results (red-dir-functions fail immediately)
I think that problem not in the script but in ftp/server/firewall/access rights setup.
There is my code example:
$conn = ftp_connect('my.host.here', 21, 10);
if (!$conn) {
throw new Exception('Unable to connect to FTP');
}
$login_result = ftp_login($conn, 'login', 'password');
if (!$login_result) {
throw new Exception('Unable to login to FTP');
}
// This is important part, because my server is behind frirewall/nat.
$paswRes = ftp_pasv($conn, true);
if (!$paswRes) {
throw new Exception('Failed to enable passive FTP mode');
}
$resPwd = ftp_pwd($conn); //Returns: "/"
$resMkdir = ftp_mkdir($conn , 'testDir'); //Returns: "/testDir", creates new dir
$resNlist = ftp_nlist($conn, '.'); //Returns: bool(false)
$resRawlist = ftp_rawlist($conn, '.'); //Returns: bool(false)
Upd:
It works if host is localhost. So looks like problem is in firewall/ftp server setup.
I use ProFtpd on Amazon EC2
Passive ports specified as PassivePorts 49152 65534
This range has been added as inbound port range in Amazon EC2 Security Groups 49152 - 65534 0.0.0.0/0

Answer 1

Ok, I have solved the problem.
It was FTP server misconfiguration (in my case - ProFTPD server):
Besides PassivePorts I had to specify MasqueradeAddress
MasqueradeAddress <your-Ftp-Server-Domain-Name-Or-Ip-Address>
Upd: Also, check this article: http://www.elitehosts.com/blog/php-ftp-passive-ftp-server-behind-nat-nightmare/