F5 Load Balancer
The F5 load balancer is the foundation of the BIG-IP platform. There are many ways to configure the load balancing of a F5 device. This article will discuss the Local LTM approach and the DNS aka GTM module. In this article, we will concentrate on DNS / GTM load balancing. After reading this article, you should have a good understanding of the F5 platform and its configuration files.
Configuration files
If you need to install F5 BIG-IP Local Traffic Manager as a load balancer for Pivotal Application Service (PAS), then you should first configure the F5 BIG-IP Local Traffic Manager as your load balancer. After this is done, you should configure the F5 BIG-IP Local Traffic Manager to forward unencrypted HTTP. This procedure assumes that you are using F5 v12.1.2 or v13.0.0. It will also assume that you have an external load balancer.
You can configure F5 BIG-IP natively. To do so, go to the F5 home page and click Local Traffic > Pools. You can then choose a name for your pool. You must also choose the Infrastructure Management node from the drop-down list. In addition, you can choose the Primary_node or Standby_node. Then, you can select the default port for your TrueSight Infrastructure Management server.
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Security
F5 loads balancers provide organizations with application-layer security and performance. They also provide enterprise-level VPNs and single sign-on capabilities for Active Directory, LDAP, and Azure AD. These systems can be deployed on virtual machines or dedicated hardware appliances. Among the other features of an F5 load balancer, Silverline(r) for DDoS protection and Web Application Firewall (WAF) protection.
The security of an F5 load balancer isn’t perfect. Recent flaws and vulnerability research have shown that F5’s BIG-IP application delivery controllers are vulnerable to remote code execution. A number of security researchers have already found and published exploits for this flaw. As such, it’s important to update your systems as soon as possible. Besides, it’s also necessary to protect your network from unauthorized access.
Today’s attackers target web applications and APIs to disrupt digital experiences. These attacks can lead to large-scale fraud. Motivated cybercriminals often bypass security controls and capitalize on inherent vulnerabilities in critical digital endpoints. As a result, your organization must balance the risks and rewards of the attack against the security of your business and customers. This is why F5 has developed security solutions that can prevent security breaches and protect your business.
Performance
The SevOne NPM load balancer is a software solution that helps you monitor and analyze the performance of an F5 load balancer. This solution automatically baselines the normal performance of an F5 environment and triggers real-time alerts when key indicators fall outside of predefined thresholds. It provides real-time reports and analysis of 20 metrics and keeps a history of as-polled data for a year. This helps prevent the need for aggregation of metrics.
It uses two widely used algorithms to manage traffic. The first algorithm uses the least connections method. This method allocates new connections to the next host, as if the last one had received the most requests. This method is simpler than more sophisticated algorithms, which use host utilization, real-world response times, and current connection counts to allocate workload to each load balancer. In contrast, the second algorithm employs the dynamic ratio algorithm.
Threats
Security experts have been warning about a recent vulnerability in F5’s BIG-IP load balancer. The vulnerability, which affects a few versions of the device, could allow an attacker to execute arbitrary commands on the device. This is bad news for organizations that rely on large amounts of data to deliver web services to their customers. The vulnerability is the result of a flaw in the way the device authenticates users.
The vulnerability is caused by a flaw in the iControl REST interface, which is vulnerable if the device is online. F5 has publicly disclosed the flaw, which was rated 9.8 on the CVSSv3 severity scale. On March 10, the F5 website posted details of the vulnerability, and proof-of-concept code was published on Rapid7’s AttackerKB vulnerability assessment portal. Since then, threat actors have been looking online for F5 devices with the iControl REST interface.
