Posted: February 16th, 2012 | Author: adq890 | Filed under: firewall, linux distro | Tags: clearOS, firewall, PPTP VPN, VPN ClearOS | No Comments »
Issue :
Can’t access / ping client in same network when connected thru PPTP VPN from public only can ping firewall IP.
Solved :
On the XP machine (works on Vista and 7 also) go to the properties of the VPN connection.
- Click on the Networking tab and double click Internet Protocol Version 4 (TCP/IPv4).
- Click Advanced and uncheck the box for “Use default gateway on remote network.”
This will route all of your local traffic through whatever network you’re locally connected to, and any remote traffic through the VPN connection. This also assumes that you’re not trying to route your internet traffic through the VPN. If you leave this option set, then you will not be able to access any local network resources without manually specifiying routes to get to them
Posted: January 19th, 2012 | Author: adq890 | Filed under: general | No Comments »
Q. What is data center tiers? What is tier 1 data center? Which tier / level is the best for maximum uptime?
A. Tier 1 to 4 data center is nothing but a standardized methodology used to define uptime of data center. This is useful for measuring:a) Data center performance
b) Investment
c) ROI (return on investment)Tier 4 data center considered as
most robust and less prone to failures. Tier 4 is designed to host mission critical servers and computer systems, with fully redundant subsystems (cooling, power, network links, storage etc) and compartmentalized security zones controlled by biometric access controls methods. Naturally, the simplest is a Tier 1 data center used by small business or shops.
- Tier 1 = Non-redundant capacity components (single uplink and servers).
- Tier 2 = Tier 1 + Redundant capacity components.
- Tier 3 = Tier 1 + Tier 2 + Dual-powered equipments and multiple uplinks.
- Tier 4 = Tier 1 + Tier 2 + Tier 3 + all components are fully fault-tolerant including uplinks, storage, chillers, HVAC systems, servers etc. Everything is dual-powered.
Data Center Availability According To Tiers
The levels also describes the availability of data from the hardware at a location as follows:
- Tier 1: Guaranteeing 99.671% availability.
- Tier 2: Guaranteeing 99.741% availability.
- Tier 3: Guaranteeing 99.982% availability.
- Tier 4: Guaranteeing 99.995% availability.
source : http://www.cyberciti.biz/faq/data-center-standard-overview/
Posted: January 18th, 2012 | Author: adq890 | Filed under: general | No Comments »
THE FUTURE IS FOREVER
6 JUNE 2012
Major Internet service providers (ISPs), home networking equipment manufacturers, and web companies around the world are coming together to permanently enable IPv6 for their products and services by 6 June 2012.
Organized by the Internet Society, and building on the successful one-day World IPv6 Day event held on 8 June 2011, World IPv6 Launch represents a major milestone in the global deployment of IPv6. As the successor to the current Internet Protocol, IPv4, IPv6 is critical to the Internet’s continued growth as a platform for innovation and economic development.
