Database High Availability can be done in two modes. One is Primary-Secondary configuration which allows one DB server to act as Primary and perform Read-Write operations. The data is replicated to Secondary nodes which can perform Read-Only operations. Another mode is Multi-Master configuration which allows Multiple DB Servers to act…
DNS Response Policy Zone (RPZ) is a method to modify or block the DNS requests of end clients. It was developed as a standard to block end users from accessing malicious domains. The RPZ is implemented as an authoritative zone configured in DNS Authoritative Server. The RPZ is transferred into…
The PowerDNS Recursor is a high-performance DNS recursor with built-in scripting capabilities. The following guide outlines the deployment methodology and installation instructions for performing Domain Name filtering via DNS servers. The solution includes PowerDNS Recursor application deployed on Ubuntu 20.04 servers.The domain block list will be stored in SQLITE3 database…
The following guide outlines the deployment methodology and installation instructions for DNS based Global Load Balancing service. The solution includes PowerDNS Authoritative application deployed on Centos 7.9 servers. The application supports static as well as dynamic DNS records. The dynamic records contain small snippets which can perform different checks based…
NGINX can be deployed as a reverse proxy in front of applications and can be used to control access to the application based on the GEO Location of the end user. NGINX can be used to restrict access to different parts of applications for specific countries or cities. NGINX uses…
NGINX can be deployed in front of web applications to improve the response time (by caching) and to provide additional layer of security. NGINX can perform the functions of Reverse Proxy, SSL Offload and Load Balancing for the Web Applications. The following guide outlines the deployment methodology and installation instructions…
The following guide outlines the deployment of FreeIPA Identity management solution. The solution provides centralized identity management for Linux and LDAP clients. The solution also includes authentication and authorization controls. FreeIPA is an integrated security information management solution combining Linux (Fedora), 389 Directory Server, MIT Kerberos, NTP, DNS, Dogtag (Certificate…
The following guide outlines the deployment methodology and installation instructions for deploying DNS Anycast Infrastructure. The solution comprises of DNS Load Balancers (dnsdist) which sit in front of the Caching DNS Servers and Load Balance the DNS queries among the backend DNS Servers. For advertising the Anycast IPs BGP routing…
Safe Shutdown and Startup of NDB Cluster To shut down the cluster, enter the following command in a shell on one of the machine hosting the management node: $ ndb_mgm -e shutdownConnected to Management Server at: 192.168.100.11:11864 NDB Cluster node(s) have shutdown.Disconnecting to allow management server to shutdown. The command…
The following guide outlines installation of MYSQL NDB Cluster on UBUNTU Linux 20.04 (64 Bit). The NDB Cluster requires minimum of 3 machines, 2 for SQL Data Nodes and 1 for Management and SQL Node combined. This installation guide covers installation of NDB Cluster on 4 machines, 2 for Data…
