After I have done some speedtests on the FortiGate firewall I was interested in doing the same tests on a Palo Alto. That is: What are the throughput differences of IPv4 vs. IPv6, measured with and without security profiles, i.e., with and without threat prevention.
It turned out that the throughput is much higher than the official information from Palo Alto. Furthermore, I was not able to test the threat prevention at all, because non of my traffic (iperf and mere HTTP) went through the antivirus engines. I have to test this again. However, here are the measured values so far:
Continue reading Palo Alto IPv4 vs. IPv6 Performance Speedtests →
Roundcube is an email webclient which is easy and intuitive to use. I am using it for my private mails, connecting via IMAP and SMTP to my hoster. One of the great advantages is the “flag” option which is synchronized via IMAP to my Apple devices.
Following is a step-by-step installation guide for Roundcube plus an update scenario. It is a kind of “memo for myself”, but hopefully, others can use it as well.
Continue reading Roundcube Installation Guide →
If you want to use you own ownCloud installation, you can find several documentation on the Internet on how to set up this server, e.g. the official ownCloud documentation, or installation guides such as this or that or here. But none of these page alone provided enough information for installing a secure server completely from the beginning.
So here comes my step-by-step guide which surely won’t be complete, too. ;) However, hopefully it will help other people while searching for their way to install ownCloud. Additionally I am showing how to upgrade an ownCloud server.
Continue reading Yet another ownCloud Installation Guide →
I was interested to tune my https sites with Apache to support only cipher suites that use the ephemeral Diffie-Hellman key exchange = perfect forward secrecy. But after searching a while through the Internet, only SSLCipherSuite with a few concrete algorithms were presented, while I wanted to use a more generic option such as known from “!MD5”. Here it is:
Continue reading Apache SSL Cipher Suites: Perfect Forward Secrecy →
I always wanted to monitor my private network with an open source tool. Since I knew some nice statistics, e.g. from the DE-CIX (printed with RRDtool) or from the Uni-Gießen (generated with MRTG), I had the idea of installing such a system by myself. Luckily I found a book from Steve Shipway, called “Using MRTG with RRDtool and Routers2“, which actually disappointed me because it did not offer a complete installation guide but mainly further information about fine-tuning the appropriate tools.
Therefore, I want to show a complete step-by-step installation of all the needed tools in order to monitor a network with MRTG, RRDtool and Routers2. “From scratch” means that there are no prerequisite to this installation guide except a plain Linux server (in my case a Ubuntu Linux) such as presented here. Okay, let’s go: Continue reading MRTG with RRDtool and Routers2 – Installation from Scratch →