I have often noticed that while running ftp server with ProFTP there are strange f’s coming with ipadress like FFFF:11.33.44.99

I got this fixed by disabling IPv6 used by Proftp. Just put this one line in your proftp configuration file /etc/proftpd.conf

UseIPv6 off

You can see the changes while analysing the /var/log/secure log file for any login attempts.

Similar Posts:

• HOWTO: Enable passive mode in FTP server with CSF firewall
• Preventing Brute Force Attacks on FTP server
• Install FTP Server for Centos/RHEL
• Accidentally deleted /etc/named.conf in Cpanel
• Enabling ModRewrite in XAMPP Apache
• How to secure your DNS server
• Fix: FreeFontPath: FPE “unix/:7100″ refcount is 2, should be 1; fixing
• bind /etc/named.conf missing
• What is Open DNS server?
• Install LAMP Server for Centos/RHEL