Proftpd passive ftp failing

Submitted by DaveOverton on Thu, 10/27/2011 - 14:23 Pro Licensee

ScientificLinux 6.1

2 servers, both are failing with proftpd this morning. from filezilla login screen

Command: PASV Response: 227 Entering Passive Mode (xxx,xxx,xxx,xxx,233,112) Command: MLSD Error: Connection timed out Error: Failed to retrieve directory listing

The xfer log has nothing, the other logs show the connection "accepted" but nothing after that. OpenSSL was updated, but I did a "yum downgrade" and no joy.

regular ftp works, passive is what gives the error.

Since ProFTPD is part of your distro, figured this is the place for the bug report.

Status: 
Active

Comments

Submitted by andreychek on Thu, 10/27/2011 - 17:08

Howdy -- yeah, not every FTP mode will work in each network environment.

The presence of some firewalls or routers can cause FTP to fail, as you're seeing.

One thing you could try to correct that is to load the FTP Connection Tracking kernel module. To do that, run this command on your FTP server:

modprobe ip_conntrack_ftp

After loading that module -- are you able to use passive mode FTP transfers on your server?

Submitted by DaveOverton on Thu, 10/27/2011 - 17:56 Pro Licensee

Yep, that did it. Hum, firewall issue. Funny thing, it was fine yesterday, on both servers. Only change was the openssl update this morning. not your problem, just thinking out loud.

Thanks again!

Submitted by duncanbbd on Sun, 10/30/2011 - 19:21

Eric,

that solved my problem too trying to backup between servers (which I posted on other thread, unable to FTP)

thanks. Brian