Category Archives: Tutorial

PRE TASKS There are some tasks you can do to prevent from unwanted results. Like: Disable selinux Remove unnecessary repositories Take a recent backup! CENTOS UPGRADE REPOSITORY Create a new centos repository: cat > /etc/yum.repos.d/centos-upgrade.repo <<EOF [centos-upgrade] name=centos-upgrade baseurl=https://buildlogs.centos.org/centos/6/upg/x86_64/ enabled=1 gpgcheck=0 EOF INSTALL PRE-UPGRADE TOOL First install the openscap version from dev.centos.org: # yum -y… Read More »

Pure-FTPD cannot connect with TLS/SSL. FileZilla log shows this and then everything stop/halt Status: Resolving address of ftp.mydomain.com Status: Connecting to XXX.XXX.XXX.XXX:21… Status: Connection established, waiting for welcome message… Status: Initializing TLS… When restarting pure-ftpd in WHM and this reveals the following message … Feb 22 23:14:47 host pure-ftpd[20248]: (?@?) [DEBUG] Couldn’t load the DH… Read More »

To verify if IPv6 is enabled or not, execute : # ifconfig -a | grep inet6 inet6 fe80::211:aff:fe6a:9de4 prefixlen 64 scopeid 0x20 inet6 ::1 prefixlen 128 scopeid 0x10[host] 1. Disable IPv6 in kernel module (requires reboot) 1. Edit /etc/default/grub and add ipv6.disable=1 in line GRUB_CMDLINE_LINUX, e.g.: # cat /etc/default/grub GRUB_TIMEOUT=5 GRUB_DEFAULT=saved GRUB_DISABLE_SUBMENU=true GRUB_TERMINAL_OUTPUT=”console” GRUB_CMDLINE_LINUX=”ipv6.disable=1 crashkernel=auto… Read More »