
If your internet connection is behind a web proxy, you need to configure the following on your CentOS server:
System-wide proxy settings – add the following lines to your /etc/environment file:
# vi /etc/environment
http_proxy=”http://proxysrv:8080/”
https_proxy=”https://proxysrv:8080/”
ftp_proxy=”ftp://proxysrv:8080/”
no_proxy=”.mylan.local,.domain1.com,host1,host2″
To apply these settings without restarting the machine run the following commands on the bash shell:
export http_proxy="http://proxysrv:8080/"
export https_proxy="https://proxysrv:8080/"
export ftp_proxy="ftp://proxysrv:8080/"
export no_proxy=".mylan.local,.domain1.com,host1,host2"
You also need to configure yum:
# vi /etc/yum.conf
proxy=http://proxysrv:8080/
I’m Rajesh Kumar, a DevOps, SRE, DevSecOps, Cloud, and Platform Engineering expert passionate about sharing practical knowledge, real-world experiences, and industry best practices. I have worked at Cotocus and regularly write about technology, travel, investing, health, product reviews, and digital marketing through my various platforms.
I publish technical articles at DevOps School, travel stories at Holiday Landmark, stock market insights at Stocks Mantra, health and fitness guidance at My Medic Plus, product reviews at TrueReviewNow, and SEO and digital marketing strategies at Wizbrand.
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When setting up a web proxy on CentOS, it is important to check how the configuration behaves across system services, automated tasks, and package managers, not just within the terminal session. Some applications may ignore shell-level proxy variables, leading to confusing connectivity failures. Defining proxy settings explicitly for the relevant services, managing internal-domain exclusions carefully, and protecting any authentication details can help avoid these problems. I would also test the configuration after a system restart to confirm that network access remains consistent.
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