Windows : How to enable ICMP echo request
As you might noticed on latest version of Windows, ICMP requests are blocked by default with the built-in firewall. Use this simple command to enable echo request : netsh firewall set icmpsetting 8 enable
Category Archives: Servers
Windows : Plesk dependency for msi45 required by mssql2008
You might encounter this issue when installing Plesk 11 with Microsoft SQL Server on Windows : Unable to install the “mssql2008_configurator-1.0.noarch” package. The following could cause the installation failure: 1) mssql2008_configurator-1.0.noarch: No suitable solutions were found for the “msi45 >= 4.5.0000.0000” dependency. 2) The dependency for “msi45 >= 4.5.0000.0000” required by the “mssql2008_configurator-1.0.noarch” package could… Read More »
Linux : How to enable php-SSH support in Debian
PHP SSH support does not come out of the box yet. The shortest and effortless path to get it working is the following procedure. DISCLAIMER : php-SSH is still beta and not enabled by default. Use only if you know what you’re doing! 1. Install the development components to build the module : apt-get install… Read More »
Linux : Restrict recursive lookup on BIND name server
To restrict as much as possible attack on your name server and avoid your resources consumed by tons of illegitimate queries, it’s wise to disable recursive lookup from the Internet for domains that are not served by your DNS server. To achieve that, simply add those parameters to named.conf “options” section : recursion yes; allow-recursion… Read More »
Linux : SpamAssassin high CPU usage, keep flipping between running and zombie state
You may notice those symptoms after updating SpamAssassin : – High CPU usage – spamd keep flipping between “running” and “zombie” state This probably mean your SpamAssassin installation is missing rule set configuration files. To resolve this issue, simply try running : sa-update Since this should have been automatically done at the installation or upgrade,… Read More »
Linux : How to replace failed drive in software RAID array
This tutorial is about how to replace a failed member of a Linux software RAID-1 array. You can monitor the status of your software RAID array through mdadm with the following command : cat /proc/mdstat This is the kind of output you’ll get in case of the secondary drive is either dead or no longer… Read More »
Linux : IPv6 addrconf prefix with wrong length 126
You may experience this error shown on “dmesg” or system logs (/var/log/messages) : IPv6 addrconf: prefix with wrong length 126 This actually indicate a device on your network trying to broadcast IPv6 information that dosen’t match your network configuration. To get rid and disable this, simply run the following commands as root : echo 0… Read More »
Windows : No Logon Servers Available to service the Logon request
You may experience this issue trying to log into a computer which is a member of a Active Directory network : No Logon Servers Available to service the Logon request. This issue may actually resolved by removing the computer from the domain, reboot and join the domain again.
Linux : How to rollback Yum updates on RHEL/CentOS
Having issues and downtime after installing latest updates using “yum update” is always a possibility. This is why having a development environment is so much important when you are running a mission critical infrastructure. However, there is an intermediate solution : using the rollback feature included in Yum. Note this option is actually not enabled… Read More »
Linux : Can’t create volume in OpenFiler
I rescently experienced this issue with OpenFiler which I never had before. Trying to create a volume into a block device simply don’t work – nothing happen when you click to do so. The only difference between this installation and the previous one is the OpenFiler system is installed on another drive/block device than the… Read More »