Web : zend_mm_heap corrupted
You may notice this error in the Apache logs : zend_mm_heap corrupted Try to enable or increase this parameter either in your Apache config, htaccess or php.ini file : output_buffering = 4096
Active Directory : Change the default display name format for user and contact objects
Here is how to change the default display name format for user and contact objects in Active Directory. By default, it display “Last name and First name”. We want to revert this to “First name, Last name”. Before doing this step, make sure your user is a member of either “Enterprise Admins” or “Domain Admins”… Read More »
Windows : Setting LAN Authentication Level on 7 Home Premium
Windows 7 Home Premium doesn’t have the “Local Security Policy” console (aka : secpol.mmc). In order to access SMB share running the old protocol version, you need to enable the Authentication LAN Manager directly inside the registry. Open the registry editor (Start > Run) : regedit Browse to : HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa Create a new DWORD value… Read More »
Linux : Partition and format external hard drive as ext3 filesystem
This tutorial is about partitioning a USB external hard drive as good for internal drive. First, list devices on your system using one of the following commands : dmesg (USB drive should appear as SCSI drive) fdisk -l | grep ‘^Disk’ Now, assuming your new drive is “sdb”, use the following command to invoke the… Read More »
Active Directory : You do not have sufficient privileges to delete Organizational Unit
Working in Active Directory Users and Computers (ADUC) trying to delete an Organizational Unit (OU), you get the following error : Active Directory Domain Services You do not have sufficient privileges to delete < Organizational Unit >, or this object is protected from accidental deletetion. By default, you need to uncheck the box “Protect object… Read More »
Web : Prevent image hot linking to your site
This article is about stopping theses sites who hot link your images, steal them and your bandwidth! I assume you are running Apache as Web server and have some basic knowledge of httpd.conf, htaccess and rewrite rules. You have two choice, either put the rules directly inside your httpd.conf vhost or inside an Apache configuration… Read More »
Qmail : HowTo generate a certificate for POP3-SSL and IMAP-SSL
This tutorial is about generating a SSL certificate to secure POP3 and IMAP communications between clients (MUA) and Qmail server (MTA). 1. Go to Qmail config directory : cd /var/qmail/control 2. Generate key : openssl genrsa -des3 -out servercert.key.enc 2048 3. Decrypt the key (get rid of the passphrase) : openssl rsa -in servercert.key.enc -out… Read More »
Linux : Error running command require /proc could not read procfs
Having this issue on Linux machine trying to run command as a user who require /proc filesystem (such as top or htop) ? [user@server ~]$ top top: /proc is not mounted, required for output data [user@server ~]$ htop Error: could not read procfs (compiled to look in /proc). This usually happen because /proc lose… Read More »
Bind : Unexpected RCODE (REFUSED) resolving ‘xx.xx.xx.xx.in-addr.arpa/PTR/IN’
Experiencing this error in Bind logs? named[xxxxxx]: unexpected RCODE (REFUSED) resolving ‘xx.xx.xx.xx.in-addr.arpa/PTR/IN’: xxx.xxx.xxx.xxx#53 This is probably because you have a forwarder in your named.conf that refuse your requests. Simply look at the end of the previous line : “xxx.xxx.xxx.xxx#53” and search this address in your named configuration file – it should be located inside the… Read More »
Bind : Transfer of ‘domain.tld’ from xx.xx.xx.xx#53 failed receiving responses permission denied
I recently notice this error on a master/slave Bind (named) DNS server setup (this error actually happened on slaves servers) : transfer of ‘domain.tld/IN’ from xxx.xxx.xxx.xxx#53: failed while receiving responses: permission denied First, make sure the “allow-transfer” directive is properly set on the primary master server : allow-transfer { xxx.xxx.xxx.xxx; }; This is probably the… Read More »