Spheron1 - - Page 7

April 28, 2011

Missing kernel initial RAM disk with SolusVM and Xen

If for any reason your /boot/solus-vmlinuz symlink as well the /boot/solus-initrd.img initial RAM disk are missing or incorrect in Dom0 on one of your SolusVM Xen slaves, then you can force SolusVM to regenerate them using the latest Xen enabled copy of the kernel installed on the server using the following command in Dom0 on the slave: php /usr/local/solusvm/includes/xenkernel.php This...

SolusVM Comments: 0

April 28, 2011

RouterOS slow learning BGP routes with Winbox open

After banging my head against a wall waiting for a RouterOS powered router to re-learn the 330,000 routes that currently make up the global routing table, I was surprised to find that seemingly Winbox slows the learning of BGP routes to a crawl. Closing Winbox allowed the router to process the entire global routing table in the normal minute or...

Mikrotik RouterOS Comments: 0

April 5, 2011

Preventing backscatter on aliased domains in Zimbra

By default, an aliased domain in Zimbra will accept all e-mail at SMTP time and then bounce a message later if it is unable to delivering it after carrying out the aliasing. This generates backscatter, which can be abused and even lead to your mail server appearing on some blacklists. Luckily, since Zimbra 5.0.12 there has been a way to...

Zimbra Comments: 0

March 26, 2011

Fortinet SSL VPN interface limitations

There seem to be some interface related limitations with the SSL VPN implementation on Fortinet’s FortiGate firewall devices which prevent you from connecting to the Fortinet SSL VPN on the IP address of an interface other than the one which your traffic enters the firewall on. In other words, even with the appropriate rules configured in the firewall policy to...

Fortinet Comments: 0

March 20, 2011

Recovering Logical Volumes deleted with lvremove

Need to recover an LVM Logical Volume that you deleted by mistake? No problem, luckily LVM archives all of the old Logical Volume and Volume Group metadata in /etc/lvm/archive/ whenever you use something like lvremove to make adjustments to the Logical Volumes. Before you start, remember that any kind of operation like this is potentially dangerous and so backup anything...

Linux Comments: 6

February 9, 2011

Parallels Plesk 9 and SSL certificates signed by an intermediate Certificate Authority (CA)

Parallels Plesk 9 doesn’t seem to like installing certificates signed by an intermediate Certificate Authority (which is becoming more and more common and will be all certificates in the next year or two) through the SSL certificates part of the Plesk interface available to both administrators and end users. A work around to this seems to be to install the...

Plesk Comments: 0

February 3, 2011

cPanel root partition space warning disabling operation of some features in WHM

If you manage to accidentally fill up the root partition on your cPanel/WHM server, then WHM helpfully disables some features such as creating and terminating (deleting) accounts so that you don’t end up with half of an account. You will see a message something along the lines of this in WHM when attempting a restricted function: The / partition on...

cPanel/WHM Comments: 0

December 31, 2010

cPanel Native SSL support failed error

If your cPanel/WHM install randomly sends you an e-mail one day along the lines of: Native SSL support failed to pass the startup test. stunnel was started instead. The exact error was: [linktest=/usr/local/cpanel/bin/linktest-ssl: error while loading shared libraries: /usr/local/cpanel/perl/Net/SSLeay/SSLeay.so: cannot open shared object file: No such file or directory ] [binary=/usr/local/cpanel/cpsrvd-ssl] [cpsrvd=/usr/local/cpanel/cpsrvd-ssl: error while loading shared libraries: /usr/local/cpanel/perl/Net/SSLeay/SSLeay.so: cannot open...

cPanel/WHM Comments: 0

December 27, 2010

Parallels Plesk for Windows upgrade and lots of session files

Be careful when running the Parallels Plesk update utility on Windows servers if you have a large number of files in “C:\Program Files (x86)\Parallels\Plesk\admin\sessions” as once it has finished the upgrade the utility will try and clear this directory before letting you do anything else, including the mandatory reboot. It seems that it is quite easy for there to be...

Plesk/Windows Comments: 0

December 19, 2010

WHMCS 4.41 and the Plesk server module

WHMCS version 4.41 has split the Plesk server automation module out into three separate versions; plesk8, plesk9 and plesk10, but the upgrade script doesn’t handle changing the automation module settings for either your servers or your products/services. As a result of this short sightedness on the developer’s part you will loose all automation of your Plesk servers (account creation, suspension,...

Plesk/WHMCS Comment: 1