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
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
This is the 6th post of the “Home Server” series. In the last post we installed the ESX system in the SSD disk. The idea is to use 2 disks in Raid1 as data storage (RAID1 data mirroring. If one disk fails, you can still work with a single one until the failed is replaced without any data loss!).
Physical… Read more
Due to the vulnerability that allows privilege escalation I wrote about in this post, Microsoft has released a cumulative update for all supported versions of Exchange Server (Exchange 2010, 2013, 2016 and 2019).
- Exchange Server 2019 Cumulative Update 1 (KB4471391), VLSC Download
- Exchange Server 2016 Cumulative Update 12 (KB4471392), Download, UM Lang Packs
A new vulnerability that affects Exchange on-premise servers has been discovered recently (https://dirkjanm.io/abusing-exchange-one-api-call-away-from-domain-admin/). By making use of the high privileges Exchange servers have by default, the attacker would be able to escalate from any user with a mailbox to Domain Admin access.
According to Dirk-jan Mollema (see upper link), the vulnerability has been tested against …
- Exchange 2013
5th post of the Home Server series in which I explain how I built my own server.
In previous posts I have shown how to install an SSD disk to your HP microserver Gen8 server. Even if you do not have this hardware, in this post I will show step by step how to install the VMWare ESXi 6.5
Download… Read more
I manage a 2 node VSX clusterXL environment that hosts 3 firewalls (virtual systems).
Some days ago I came across a problem in which one of them started (or maybe more time ago but not aware) to experience bad performance, outages, timeouts…
Trying to make a failover and move the VS to the other node fixed the problem until … Read more
Although it is not essential I strongly encourage you to install an SSD disk to your HP Microserver Gen8 to host the system you want to run. I will use it for a VMWare ESX and the virtual machines that will create in it. As I said in the previous post, since the prices are more than affordable, the price/performance … Read more
A common task among system administrators is the renewal of SSL certificates. It is important to keep track of expiration dates so that it is not too late for us to renew it.
You can simply create an excel or some other type of record of the certificate dates, but you have to remember to check it from time … Read more
Symptom: Large mail.que file size
This is the file in which exchange manages its queues before finally delivering emails. It is usually located in <Exchange_Installation_Path>/TransportRoles/data/Queue