To run a website, you need several services such as web server, database server, mail server and more.
These services need to communicate with each other to make web apps work.
But in AWS, this communication can break due to default security settings.
AWS EC2 instances are computing services that can be used to host web services and applications. These instances belong to an Amazon virtual cloud and they can be accessed with the help of IPs in your specified range.
In our role as Outsourced Tech Support for web hosting companies, we manage Amazon EC2 instances for our customers with two types of external IPs – Public IP and Elastic IP. (more…)
Did you know that each PHP version is fully supported only for two years from its initial stable release? Unsupported versions are vulnerable to security exploits, which is why you need to timely update PHP versions.
In the case of AWS, PHP upgrade should be performed in all server instances that run PHP, for securing them. But the upgrade steps may vary with the OS flavour in that server.
By default, an EC2 instance comes with just a single public IP. However, there are many scenarios where you need multiple public IPs for your web services to work.
For instance, multi-site WordPress hosting, multiple websites with SSL, high availability fail-over setup for services, network appliances like load balancer, etc. require multiple IPs. (more…)
Amazon claims to have a system to white-list all their IP addresses at Spamhaus regularly. But we still see Amazon EC2 users reporting mail issues due to IP blacklists by Spamhaus.
IP blacklisting occur when your mail server gets compromised due to any malware or open vulnerabilities. Attackers can hijack your mail server and send spam mails from it. (more…)
From payment confirmation to support queries, emails play a vital role in online business communication. Delayed alerts or lost orders end up adversely affecting the business.
In AWS EC2 instances, mail delivery problems can happen due to many reasons, mainly port 25 connection limits, IP blacklists and port 25 blocks.