Replace defective HDD on CentOS 6 (mbr)

Prologue: sda old but works, sdc defective. I will replace sdc.

First of all, mark disk sdc as defective and remove from raid.

mdadm --manage /dev/md0 --fail /dev/sdc2
mdadm --manage /dev/md1 --fail /dev/sdc1
mdadm --manage /dev/md2 --fail /dev/sdc3
mdadm /dev/md0 -r /dev/sdc2
mdadm /dev/md1 -r /dev/sdc1
mdadm /dev/md2 -r /dev/sdc3

Physically replace disk and copy partition table to new one.

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Nginx as CDN POP

This released on ubuntu with packages nginx and nginx-extras (some modules used additionally that not avail on Alma packages, that’s why ubuntu).

We will store cached files in /cdncache and logs in /var/log/nginx/cdnlogs.

Our CDN URL is for and for

We will server static files (mp4,jpg,png,gif,jpeg,js,ico,html,htm,webp,css,mp3,wav,swf,mov,doc,pdf,xls,ppt,docx,pptx,xlsx,ttf,woff,woff2), accept only GET queries and disallow listing for /.

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Working fail2ban for Asterisk (security log)

Hey, just another config draft from me. In that article we will enable fail2ban jail for asterisk on UDP/5060 via iptables.

In /etc/sysconfig/iptables we should allow UDP/5060 for all (if you want to enable only for your subnet why you need fail2ban? Just allow and don’t read that article).

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