Category Archives: AVANU

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Port Mapping and Flexible IP

Category : AVANU

System administrators have always thought about IP services loading issues. Before load balancing products like WebMux were available, the solutions were either continually upgrading to bigger servers, or using multiple servers with multiple IP address access points. Different clients could be assigned to different server, even though the contents or services provided are the same.

The availability of the load balancer has eased load balancing issues, but migrating the existing system, with minimal interruption, still proves a challenge to many.

In a single server setup with one IP address, it is easy and straightforward to add a load balancer and extra servers. However, for multiple servers with multiple IP addresses, this task is harder.

One solution is mapping all the domains to one IP address/port called port mapping. FTP, email, and most of the Internet are accessed using domain names. Other IP applications, like many UDP services, are often accessed through hard-coded IP address/port. This causes a major service interruption, as clients have to ask other clients to re-program the IP address.

A better solution is setting up multiple virtual farms that will all map to a group of servers. Existing clients do not need to make any changes to enjoy the benefits of load balancing and failover protection. WebMux’s full flexibility allows any server/port to associate with any virtual farm, which makes this solution simpler than with another load balancer. Without the flexibility, you may have to reprogram hard-coded setup, which wastes time resources, services, and money.


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Automatic Attack Detection and Flood Control

Category : AVANU

What is the difference between WebMux’ Automatic Attack Detection (AAD) and the Flood Control feature?

The AAD feature deals with controlling the number of concurrent open TCP connections that come from the same IP. Depending on situation, it may be perfectly normal to get 50 concurrent connections coming from the same client. In some other situations, seeing more than 5 concurrent connections might be unusual. It may require some other means of network analysis (outside of the WebMux) to help you determine what the normal activity it for your environment. Or you can refer to you server’s actual resource limits and set AAD TCP connection threshold to a value under the servers real limits for concurrent connections as a safeguard against server overload. AAD helps safeguard for situations where an attacker from a single IP can open so many TCP connections and leave them open that the farm can no longer accept any new connections.

It is still possible for an attacker, using a few concurrent TCP connections that are below the AAD TCP connection limit, to generate such a tremendous amount of packets that servers run out of resource to process them and severely disrupt service. That is where the Flood Control feature comes in. Flood Control deals with limiting the allowable packet rate from a single IP. The “Packet Rate” setting can also be understood as a limit on the allowable average number of packets per second and “Packet Threshold” can be understood as the limit on the number of instantaneous packets. Again, it may require network analysis outside of the WebMux to determine what your normal network activity is like in order to get the values that are appropriate for your environment. For example, if you know how many packets per second and packet bursts your servers are able to handle, you can set the Flood Control limits somewhere below those values in order to safeguard against server overload.


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New Management Interface for WebMux Enterprise-class Load Balancing/ADC Solution to Optimize Use With Mobile Technology

Category : AVANU

AVANU WebMux v12 features a new interface for managing local network applications and services traffic using smartphones and tablets

AVANU releases WebMux Network Traffic Manager v12, featuring a new management interface to optimize the use of smartphone and tablet mobile technologies. WebMux is an enterprise-class load balancing/ADC solution that manages, controls, and secures local network L4-7 traffic for high availability of TCP/UDP IP applications and services. WebMux reliably keeps internal and external clients connected to applications and services being served by the network server farms. The new interface increases the WebMux management convenience and ease in today’s highly mobile work environment. All WebMux hardware appliance models and Virtual WebMux software editions have the same extensive and robust load balancing features that is affordable for any size business. The WebMux appliances come with a 2-year product warranty with 1-year product support and Virtual WebMux editions come with 1-year product support.

“AVANU continues to focus on delivering products that are easy to use and maintain without jeopardizing performance, quality, and capability to meet every customer’s diverse requirements and budgets,” says Pamela Sun, President of AVANU.

AVANU launched the WebMux Simplicity Project in 2014 to simplify the entire user experience and lower the complexity bar when setting up a sophisticated enterprise-class load balancing/ADC solution. The project started by adding setup wizards making WebMux easy to configure and quick to deploy for commonly used applications and services. Other quick configuration options include the front panel LCD on the WebMux hardware appliance and the secured GUI browser interface. Other terms for a Network Traffic Manager (NTM) include application delivery controller (ADC), load balancer (LB), hardware load balancer (HLB), network load balancer (NLB), server load balancer (SLB), and local traffic manager (LTM).

Supporting mobile devices significantly adds to the WebMux user experience.

 


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