| Home Server (9) – Upgrade HP Microserver Gen8 CPU |
Im using my Microserver Gen8 a lot and, sometimes the poor performance of the CPU is noted (when showing galleries with many images for example). So I decided to replace it by another better one.
I chose the cpu model based on this resource
Those are compatible CPU with different performances prices and all of them … Read more
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| Home Server (8) – Update iLO4 firmware (HTML5 console) |
In this post, I show how I update my Microserver Gen8 iLO4 version. One of the ways to do it is via command line but i decided to use the web interface (the most common way).
At the time of writing this, the version i had was iLO 2.50 (Sep 23 2016) and the new version is … Read more
| Checkpoint – Custom application signature ACST |
This time I show you the Checkpoint “Application Control Signature Tool”. This tool allows you to create your own Apps and URL filtering signatures.
For example, I’m using it to block Torrent clients based on the User-Agent, but it is very versatile and you can use it in many ways.
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| Checkpoint – Useful SNMP OIDs to monitor (VSX) |
It is very important to keep your Checkpoint environment monitored. Given that it offers a wide variety of SNMP data, I have collected some of the (in my opinion) most useful OIDs MIBs. Altough I use Icinga and Grafana (as you can see the related outputs in this post), almost any monitoring system can be used to get … Read more
| Security – List available cipher suite using nmap |
If you are in process of securing your web server or site, there are some tools and online resources that can help us a lot (in one of the following posts will show you some of them).
But simply using the command the fantastic nmap tool, another interesting feature is listing the available cipher suite certain site offers using the … Read more
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| Checkpoint – Unexpected high cpu usage and SecureXL |
Last monday I realized that the cpu was very high on one of my Checkpoint VSX nodes.
Looking at my Icinga graphs it seemed it started on friday at 3 o’clock:
Running a top directly on the VSX, I delimited the high to one of the virtual systems that runs on that VSX. In this image the fwk2 threads that … Read more
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| Security – View HTTP headers using tcpdump |
If you need to trace the HTTP request and response headers by capturing the related packets, you can use tcpdump in this way:
tcpdump -i ens192 -A -s 10240 'tcp port 80' | grep -v IP | egrep --line-buffered "..(GET |\.HTTP\/|POST |HEAD )|^[A-Za-z0-9-]+: " |sed -r 's/..(GET |HTTP\/|POST |HEAD )/\n\n\1/g'
For example, filtering tcp port 80 and 192.168.10.100 IP address:… Read more
| Sysadmin – Best wiki software / documentation tool |
Some time ago I was researching to find a good tool to create and manage IT documentation at work. These are the features that were essential for me:
| VMWare – Accessing VM boot menu – BIOS too fast |
Probably you have noticed It’s a pain when you have to access the boot menu of a virtual machine by pressing <ESC> button while in the VMWare BIOS POST screen. It clears so fast you have to press the button multiple times, but still very complicated (if you press it after when the boot menu has been displayed, it … Read more
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| Home Server (7) – Install Linux Debian virtual machine in ESX |
In this 7th post of the Home Server series, after having configured a SSD drive, a working ESX environment and the RAID disks, let’s create our first virtual machine based on Debian Linux.
For the goal we want to achieve (hosting a web server, our personal files, personal streaming server, …) we do not even need the graphic … Read more
