OCI

Ever spent hours wrestling with an application that seems perfectly fine, only to hit a roadblock that feels completely invisible? Chances are, your application isn’t the problem. When deploying services on Oracle Cloud Infrastructure (OCI), connection failure is usually not a coding issue. It’s a network issue. Traffic, before it can reach your running code, must pass through a series of security checkpoints, each acting like a protective gate. The biggest mistake new users make is thinking that opening a port is a single action. In reality, OCI uses a layered security model, and if even one gate is closed, the connection fails. ...

If you encounter the error messages shown below when attempting to run docker-compose up in OCI, a solution to the problem can be found in the following steps: failed to create network traefik_default: Error response from daemon: Failed to program FILTER chain: iptables failed: iptables --wait -I FORWARD -o br-5501386794d6 -j DOCKER: iptables v1.8.4 (legacy): Couldn't load target `DOCKER':No such file or directory Try `iptables -h' or 'iptables --help' for more information. (exit status 2) or ...

Configuring an SMTP Server on Oracle Cloud Infrastructure can be a useful way to send email messages from your applications or services. However, Oracle Cloud Infrastructure will block Port 25 by default and it cannot be removed by configuring engress rule in the security list. To bypass it, you will need to create an Email Relay in the Oracle Cloud Infarstracture. In this blog, I will show you how to configure the SMTP relay on Oracle Cloud Infrastructure (OCI). ...