Select Page

aws


How to fix Amazon AWS EC2 Connection timed out error in SMTP

Here at Bobcares, we provide Server Administration and Maintenance services to AWS account owners.

An error we sometimes see in Amazon EC2 instances is : Connection timed out error in SMTP

This is usually caused due to various reasons such as mail server security restrictions, network routing issues or even port blocks at ISP or AWS levels.

(more…)

How to update PHP version in Amazon Linux to PHP 5.6

How to update PHP version in Amazon Linux to PHP 5.6

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.
(more…)

How we setup AWS disk usage monitoring for EC2 instances

How we setup AWS disk usage monitoring for EC2 instances

An EC2 instance without enough free disk space, can crash instantly. That’s why having a proper AWS disk usage monitoring system is vital for EC2 instances.

Amazon provides CloudWatch monitoring script for EC2 Linux-based instances. But it requires additional customization to make it effective for disk usage monitoring.

(more…)

AWS Port 25 block – Why does it happen and how to fix it?

AWS Port 25 block – Why does it happen and how to fix it?

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.

(more…)

HTTP/2 is vulnerable to DoS attacks. Here’s how to fix them.

HTTP/2 is vulnerable to DoS attacks. Here’s how to fix them.

Everyone loves fast, secure websites. Google’s SPDY and it’s successor HTTP/2 was seen as a big step towards that goal.

As of Aug 6th 2016, 9.1% of websites use HTTP/2, and the trend is seeing a steep rise. All looked good. (more…)

Setting up AWS for HTTP/2 support

Setting up AWS for HTTP/2 support

As per recent statistics, websites adopting HTTP/2 protocol are rapidly increasing and around 68% of HTTPS traffic is now attributed to HTTP/2.

HTTP/2 uses techniques to minimize the number of connections and proactively serve page resources to improve site speed and performance.

 

(more…)

AWS WordPress update failures – Why does it happen and how to fix them

AWS WordPress update failures – Why does it happen and how to fix them

Where do people host their WordPress sites? If Google Trends is anything to go by, more and more webmasters now prefer cloud platforms such as Amazon Web Services (AWS). It’s fueled by the popular notion that everything in cloud is super easy – one-touch scalability, quick deployments, and convenient backups. However, things are not so rosy in reality. (more…)