For outgoing mail, this automatic presentation of the correct certificate doesn't work because Postfix doesn't support it. Instead, we have to sign the Postfix certificate with one certificate that contains every domain on the server that is used for autoconfigured outgoing mail (the LetsEncrypt limit is 100 domains). This means that the main domain in Virtualmin (the parent of the server hostname that we already used to sign the server certificate, let's call it myserver.com) must be configured at Virtualmin > Server Configuration > Website Options with "Default website for IP address?" set to "Yes" and for all other domains the setting "Website matches all sub-domains?" must be set to "No".
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I have used shared hosting for over 7 years before I finally decided to upgrade to a VPS server. When I was using shared hosting, I had so many problems with malware, slow loading time, brute force attacks and so many other issues. Now, my life is so much easier with VPS. What amazes me the most is the support team; they simply exceed my expectations and they are ALWAYS available to answer my questions.

Every plan has some appealing configuration options. In particular, along with support for the usual Linux variants – CentOS, Ubuntu, Fedora, Debian – you can choose Windows Server 2008, 2012 or 2016 for only a $5 a month premium. That's very good value, and if you're more familiar with Windows than Linux, it could save you from lots of management hassles later on.
For security reasons, the first thing you should do after starting the server for the first time is login at the console using the administrator username and password (as configured above or given to you by the hosting company) and install the latest operating system patches. On Ubuntu and other Debian-based systems you can do this with the following commands:
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Managed VPS plans offer a managed environment similar to our shared hosting accounts, but with increased resource availability. If you are outgrowing a shared hosting environment, but are not ready yet to make the leap to a dedicated server, you should consider a managed VPS. This plan is also a good option if you need certain customizations that are not provided with shared hosting plans, but you would still like A2 Hosting to handle configuration changes, software upgrades, and other system administration tasks.
“WindowsVPS.Host is set up with an aim to serve customers in an excellent manner by providing them quality service. We strongly believe in high quality standards and Hence you’ll always find our services better than every other host in this industry.We understand the value of time and hence our ordering process is very simple. Customers can choose servers from multiple price levels to suit their budgets.”
For outgoing mail, this automatic presentation of the correct certificate doesn't work because Postfix doesn't support it. Instead, we have to sign the Postfix certificate with one certificate that contains every domain on the server that is used for autoconfigured outgoing mail (the LetsEncrypt limit is 100 domains). This means that the main domain in Virtualmin (the parent of the server hostname that we already used to sign the server certificate, let's call it myserver.com) must be configured at Virtualmin > Server Configuration > Website Options with "Default website for IP address?" set to "Yes" and for all other domains the setting "Website matches all sub-domains?" must be set to "No".

Managed VPS plans offer a managed environment similar to our shared hosting accounts, but with increased resource availability. If you are outgrowing a shared hosting environment, but are not ready yet to make the leap to a dedicated server, you should consider a managed VPS. This plan is also a good option if you need certain customizations that are not provided with shared hosting plans, but you would still like A2 Hosting to handle configuration changes, software upgrades, and other system administration tasks.

If you want to control your server from the deepest level possible, you’re going to need to go with a VPS plan that offers root access. Root access allows you to edit all of the files on your virtual server. This includes system-critical files. Having this access can be beneficial if you’re looking to install programs or implement complex coding. However, it’s very easy to ruin your site when you have full root access.
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Note that I have included tests from some reputable DNS blacklists - these can make a big difference to server load. Barracuda requires you to register your IP address. Note also that I have enabled memcached to avoid a problem with "unable to get exclusive lock" errors in the mail log. Memcache is also useful for caching plugins like W3 Total Cache in WordPress. You can install it with a simple APT command:
Website owners with misconfigured CMS scripts or out of date security versions of code risk MySQL injections particularly that can lead to the theft of an entire database. VPS admin login panels, cPanel logins, FTP connection routes, and email servers running on Apache are all common attack vectors for script bots which are programmed to target common URL structures on domains.
Managed WordPress hosting could be the best solution for those who want to run a resource-heavy WordPress site or a site that attracts extremely heavy traffic. Left unoptimized, WordPress can consume a lot of your resources, which necessitates the need to operate a WordPress site in an optimized, managed hosting environment that ensures high performance.

The most obvious and popular reason for a VPS is to run a single website, or multiple websites. However, you can use them for pretty much anything that requires access to the internet – such as a web application like Nextcloud to run your own Dropbox alternative – or to create your own virtual private network to better secure the internet connection of your PCs and mobile devices.

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