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CloudStack Ubuntu XenServer

Running Ubuntu 14.04 “Trusty Tahir” on XenServer CloudStack

The recently released Ubuntu 14.04 “Trusty Tahir” LTS release comes with Xen HVM (Hardware-assisted virtualization) support. Previous LTS releases supported the older Xen PV (para-virtualization) mode only. Phoronix has recently published a comparison between Ubuntu 14.04 Xen PV with Xen HVM virtualisation which seems to suggest that Ubuntu 14.04 with Xen HVM performs better than […]

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Security Ubuntu

Automatic Installation Of Security Updates On Ubuntu

A new OpenSSL vulnerability called heartbleed has been found and patched. Information on the vulnerability is available on the CVE Website and there is even a dedicated site for the issue. While most of us keep our system regularly update our systems using apt or yum, it is best advised have an automatic update process […]

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Security Ubuntu

Block failed OpenVPN logins with fail2ban

The following configuration successfully bans failed OpenVPN authentication attempts on Ubuntu 12.04 LTS. OpenVPN has been configured to authenticate against local password database via PAM. jail.conf [text] [openvpn] enabled = true port = openvpn protocol = udp filter = openvpn logpath = /var/log/openvpn.log maxretry = 4 [/text] /etc/fail2ban/filter.d/openvpn [text] [INCLUDES] before = common.conf [Definition] _daemon […]