If you hold a website and use SSL/HTTPS with Certificates theres is often the question should i block Port 80? The most Admins think after the Major Changes of the Browsers to pull first HTTPS Port 443 they can close the HTTP Port 80. But you should NOT do it! Why? most Bots scan at first Port 80 for Content or for Listening Web Servers. More Details: https://letsencrypt.org/de/docs/allow-port-80/
Category: FreeBSD Unix
Firefox Bug more than a Feature no Sound after Update
If you use firefox for hamradio like openwebrx or kiwisdr the Sound will die after a Update! That’s NO Driver or NO Linux or a WEBSDR Problem, The Problem is DISABLED AUDIO startup on Firefox Fix: Enter at the URL-BAR “about:config” search entry “media.autoplay.block-webaudio” to false Restart Firefox and be happy.. If you are a Security Nerd then use 2 Firefox Profiles for Web and different for SDR-Radio..
Convert WordPress Blog into Static Websites
For some reasons you want to convert your WordPress with Linux Tools into a Static Website: low level Hosting no SQL + PHP for higher Security Then open a Terminal and enter into a Text Editor: nano wp2statis.sh: #!/bin/bash wget \ –recursive \ –no-clobber \ –page-requisites \ –html-extension \ –convert-links \ –restrict-file-names=windows $url-of-site exit 0 Advantage? wget runs on most WP-Themes low Load on the convert Process Script can be used to run by Cron automaticly every Night !
Website Speed Test with Linux
If you own a Blog and want to check the Speed with your local Linux Computer use a commandline tool called curl. Open a Terminal and enter: curl -o /dev/null -s -w 'Connect: %{time_connect}\nStart Transfer: %{time_starttransfer}\nTotal: %{time_total}\n' https://www.yourdomain.de System Echos: Connect: 0,084774 Start Transfer: 0,173280 Total: 0,228651 Advantage? You will see the Website Load Time of Users at your Location (Country Area) You can check “high performance Clouds” vs. “bare metal Servers” or “virtual Hosting” You see that mostly expensive Hosting is wasted money cause “shared” IO V-Host is SLOWER! You get the real “felt” IO for Users who […]
Locale Umloud Problems Cron
If you run scripts to handle text output by cronjobs your perhaps get problems with umlouds “ÖÄÜ” cause they are displayed by “**”. This is a problem cause cron uses “C” setting as locale, you can test it by setting it into root crontab: open crontab from root with: $su – root $crontab – insert * * * * * locale This will mail cron’s locale echo to the mailbox of root! Read root’s mail! After tests remove the locale entry at crontab! Howto fix for Scripts: open crontab from root with: $su – root $crontab -e insert (for German): […]
Linux Console: SSH Echo Last User LOGIN Info
If you use SSH Logins to your Systems, you perhaps want to know, who logged in last days and from which IP Address. Screenshot SSH Login Echo LAST Info: Howto: Open the .profile File at your Home with a Editor and enter: clear last -n 4 This will echo after login the last 4 Logins including the used IP’s To prevent Hackers to purge the lines set the .profile File “readonly” sudo chmod 444 .profile sudo chown root:root .profile