vps Piergiorgio Venuti

VPS

vps

A virtual server (Cloud server) or VPS (Virtual Private Server) is a full-fledged server with its own operating system and well-defined hardware features only that unlike a classic server it shares physical resources with other virtual machines in this way multiple VPS can run simultaneously on the same server (hypervisor).

This virtualization technique allows significant cost savings and an optimization of hardware resources as it is possible to run multiple operating systems on the same hardware.

VPS – Advantages / Disadvantages

Advantages:

 

   ♦ Migration: It is possible to “move” (migrate) a VPS from one server (hypervisor) to another (even without interruption of service).

Example: You have created a server  on a hypervisor in Italy and you want to move it to a server in America. With a VPS, as long as the Cloud Provider has another Datacenter in America, this can be done quickly.

   ♦ Scalability: It is the possibility of increasing or decreasing the hardware resources (CPU, RAM, Disk, etc) without rebuilding the VPS and in some cases without restarting it in full transparency to users who use the services provided.
Example: A VPS of 2 cores, 1 GB of RAM and 20 GB of disk has been created but after a few months we realize that the RAM memory is insufficient for the services provided and it is necessary to increase it. With a VPS it is very easy to solve this problem, just increase the RAM from the configuration panel and the new configuration will be applied (in the case of linux systems without the need to reboot).

   ♦ Autoscaling: It is the possibility to increase or decrease the resources (scaling) automatically according to well defined hardware policies. This technique is extremely valid in cases of load peaks.
Example: A VPS has been created with 2 cores, 1 GB of RAM and 20 GB but in some periods of the year due to the high user access these resources are not sufficient, then in this case it is possible to configure these policies:

a) If the CPU is at 90% for more than 1h then the CPU of a core increases every 30min for a maximum of 6 cores and then if the CPU is less than 10% for more than 1h decrease the CPU of a core every 30 min up to a minimum of 2 cores.

b) If the RAM is 99% for more than 1h then increase the RAM of 1Gb every 30min for a maximum of 32Gb and then if the RAM is less than 50% for more than 1h decrease the RAM of a core every 30 min until at a minimum of 1Gb.

   ♦ Low cost: by comparing the cost of a VPS to that of a fiscal server like hardware resources, the cost of a VPS is much lower, especially considering that some cost items are already included in the VPS fee. :
a) Energy consumption;

b) Internet band;

c) Cost of public IP addresses;

d) Costs related to housing (cooling, surveillance, etc);

e) Firewall;

f) Technical assistance.

Disavantages:

   ♦ Shared resources: Depending on the configurations and characteristics of the Cloud Provider, some hardware resources, such as the CPU, could be shared so performance may be lower than a physical server. This condition is not always true as it is possible to request a 100% allocation on all hardware resources to your Cloud Provider.

Limits:

 

   ♦ OS Virtualization: Not all operating systems and platforms can be virtualized (Eg AS400, Apple OS).
   ♦ Band: Although this is not an inherent problem of virtualization itself there could be latency differences in the Internet connection between a physical server in the company and a VPS if users are predominantly within the company and if the company has not an adequate Internet line.
Example: A physical server in the customer’s DMZ is accessed by its LAN users via a 10Gb line, if the server is virtualized and becomes a VPS at a Cloud provider, access to it is transmitted via the client’s Internet line which may be more slow.

 

False myths:

   ♦ A VPS does not have the same performance as a physical server: By allocating 100% of the physical resources and correctly dimensioning a VPS the latter has nothing to envy to a physical server from a performance point of view.
   ♦ A VPS is less secure than a physical server: A VPS can have the same degree of security as a physical server because it is possible to adopt the same security measures (Firewall, Antivirus, Hardening, VPN) applicable to a Fiscal server.

[btnsx id=”2931″]

 

Useful links:

IaaS | Cloud | Infrastructure as a Service

Alternative to the NAS

Demo Cloud Servers

Free Microsoft Windows licenses

New templates for Cloud Server

Docs

Share


RSS

More Articles…

Categories …

Tags

RSS darkreading

RSS Full Disclosure

  • SEC Consult SA-20241112-0 :: Multiple vulnerabilities in Siemens Energy Omnivise T3000 (CVE-2024-38876, CVE-2024-38877, CVE-2024-38878, CVE-2024-38879) November 13, 2024
    Posted by SEC Consult Vulnerability Lab via Fulldisclosure on Nov 12SEC Consult Vulnerability Lab Security Advisory < 20241112-0 > ======================================================================= title: Multiple vulnerabilities product: Siemens Energy Omnivise T3000 vulnerable version: >=8.2 SP3 fixed version: see solution section CVE number: CVE-2024-38876, CVE-2024-38877, CVE-2024-38878, CVE-2024-38879 impact: High...
  • Security issue in the TX Text Control .NET Server for ASP.NET. November 13, 2024
    Posted by Filip Palian on Nov 12Hej, Let&apos;s keep it short ... ===== Intro ===== A "sudo make me a sandwich" security issue has been identified in the TX Text Control .NET Server for ASP.NET[1]. According to the vendor[2], "the most powerful, MS Word compatible document editor that runs in all browsers". Likely all versions […]
  • SEC Consult SA-20241107-0 :: Multiple Vulnerabilities in HASOMED Elefant and Elefant Software Updater November 10, 2024
    Posted by SEC Consult Vulnerability Lab via Fulldisclosure on Nov 09SEC Consult Vulnerability Lab Security Advisory < 20241107-0 > ======================================================================= title: Multiple Vulnerabilities product: HASOMED Elefant and Elefant Software Updater vulnerable version:
  • Unsafe eval() in TestRail CLI November 7, 2024
    Posted by Devin Cook on Nov 06This is not a very exciting vulnerability, but I had already publicly disclosed it on GitHub at the request of the vendor. Since that report has disappeared, the link I had provided to MITRE was invalid, so here it is again. -Devin --- # Unsafe `eval()` in TestRail CLI […]
  • 4 vulnerabilities in ibmsecurity November 3, 2024
    Posted by Pierre Kim on Nov 03## Advisory Information Title: 4 vulnerabilities in ibmsecurity Advisory URL: https://pierrekim.github.io/advisories/2024-ibmsecurity.txt Blog URL: https://pierrekim.github.io/blog/2024-11-01-ibmsecurity-4-vulnerabilities.html Date published: 2024-11-01 Vendors contacted: IBM Release mode: Released CVE: CVE-2024-31871, CVE-2024-31872, CVE-2024-31873, CVE-2024-31874 ## Product description ## Vulnerability Summary Vulnerable versions:...
  • 32 vulnerabilities in IBM Security Verify Access November 3, 2024
    Posted by Pierre Kim on Nov 03## Advisory Information Title: 32 vulnerabilities in IBM Security Verify Access Advisory URL: https://pierrekim.github.io/advisories/2024-ibm-security-verify-access.txt Blog URL: https://pierrekim.github.io/blog/2024-11-01-ibm-security-verify-access-32-vulnerabilities.html Date published: 2024-11-01 Vendors contacted: IBM Release mode: Released CVE: CVE-2022-2068, CVE-2023-30997, CVE-2023-30998, CVE-2023-31001, CVE-2023-31004, CVE-2023-31005,...
  • xlibre Xnest security advisory & bugfix releases October 31, 2024
    Posted by Enrico Weigelt, metux IT consult on Oct 31XLibre project security advisory --------------------------------- As Xlibre Xnest is based on Xorg, it is affected by some security issues which recently became known in Xorg: CVE-2024-9632: can be triggered by providing a modified bitmap to the X.Org server. CVE-2024-9632: Heap-based buffer overflow privilege escalation in _XkbSetCompatMap […]
  • APPLE-SA-10-29-2024-1 Safari 18.1 October 31, 2024
    Posted by Apple Product Security via Fulldisclosure on Oct 31APPLE-SA-10-29-2024-1 Safari 18.1 Safari 18.1 addresses the following issues. Information about the security content is also available at https://support.apple.com/121571. Apple maintains a Security Releases page at https://support.apple.com/100100 which lists recent software updates with security advisories. Safari Downloads Available for: macOS Ventura and macOS Sonoma Impact: An […]
  • SEC Consult SA-20241030-0 :: Query Filter Injection in Ping Identity PingIDM (formerly known as ForgeRock Identity Management) (CVE-2024-23600) October 31, 2024
    Posted by SEC Consult Vulnerability Lab via Fulldisclosure on Oct 31SEC Consult Vulnerability Lab Security Advisory < 20241030-0 > ======================================================================= title: Query Filter Injection product: Ping Identity PingIDM (formerly known as ForgeRock Identity Management) vulnerable version: v7.0.0 - v7.5.0 (and older unsupported versions) fixed version: various patches; v8.0 CVE number:...
  • SEC Consult SA-20241023-0 :: Authenticated Remote Code Execution in Multiple Xerox printers (CVE-2024-6333) October 29, 2024
    Posted by SEC Consult Vulnerability Lab via Fulldisclosure on Oct 28SEC Consult Vulnerability Lab Security Advisory < 20241023-0 > ======================================================================= title: Authenticated Remote Code Execution product: Multiple Xerox printers (EC80xx, AltaLink, VersaLink, WorkCentre)  vulnerable version: see vulnerable versions below fixed version: see solution section below CVE number: CVE-2024-6333...

Customers

Newsletter

{subscription_form_1}