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Archive for category Technical

Embedded Jetty: How to upgrade from version 6 to 9

February 6, 2014
Some say you might never change a running system. In case of our servlet container Jetty this might have been right, since we haven't updated it for more than five years. There was no need to. It worked fine. Nevertheless the change had to come someday and this is how we managed to update a 5+ year old running servlet container without any trouble. Continue reading »

Internet Explorer 7: Update or get a new computer

January 29, 2014
Internet Explorer
Microsoft Internet Explorer causes a lot of headaches to many web developers. Our SoftwareDEMO development team also struggles with the browser's incompatibility and sometimes strange behavior. A US based online job portal offers all customers that are bound to IE7 to adopt the costs for new hardware that enables recent web browsers. Continue reading »

How to set up a split depot in OPSI software distribution that separates public from custom files

January 30, 2012
OPSI Software Distribution
If you install OPSI packages on the OPSI server, they will be extracted to the depot directory/opt/pcbin/install. For some packages it's necessary to place customized files inside this area. In this situation, OPSI depot and packages are mixed up with private, individual files. The solution for this is a split depot which prevents custom related files from mixing up with OPSI packages. Continue reading »

QNAP NAS: configure rsyncd/rsync with extended ACL rights

December 21, 2011
NAS rsync installation
Some Network Attached Storage (NAS) servers like the QNAP-419 NAS do not support extended ACLs in their rsyncd. To fix this issue you can install a new ACL enabled rsyncd to your original one. This is a guide of how to install the new ACL enabled rsyncd. Continue reading »

How to fix routing problems with OpenVPN and DMZs

December 13, 2011
Routing problem with OpenVPN and DMZs
Using OpenVPN to connect different DMZ can cause trouble because the OpenVM is located in the same DMZ as the web server. IP packets will be sent not using the default gateway. As a result of this, the web server does not know about the VPN client network and the answer packets are blocked by the iptables based firewall. This is how you can fix this problem... Continue reading »