Today I notices that my WordPress website consumes 30% CPU.
Preventing OpenVPN clients from seeing each other
Listing existing rules
sudo docker exec -it dockovpn_dockovpn_1 bash
iptables --list
Chain INPUT (policy ACCEPT)
target prot opt source destination
ACCEPT udp -- anywhere anywhere state NEW,ESTABLISHED udp dpt:openvpn
ACCEPT all -- anywhere anywhere
Chain FORWARD (policy ACCEPT)
target prot opt source destination
ACCEPT all -- anywhere anywhere
ACCEPT all -- 10.8.0.0/24 anywhere
ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
ACCEPT udp -- anywhere anywhere state ESTABLISHED udp spt:openvpn
ACCEPT all -- anywhere anywhere
Running VPN Server with Access Server in a Docker container
Run the docker container:
sudo docker pull openvpn/openvpn-as
sudo ufw allow 1194/udp
sudo ufw allow 943/tcp
sudo ufw allow 1443/tcp
sudo docker run -d --rm \
--name=openvpn-as --device /dev/net/tun \
--cap-add=MKNOD --cap-add=NET_ADMIN \
-p 943:943 -p 1443:443 -p 1194:1194/udp \
-v /var/lib/openvpn-as:/openvpn \
openvpn/openvpn-as
sudo docker logs -f openvpn-as | grep "generated pass"
Auto-generated pass = "*********". Setting in db...
Configuring the access to GitHub with SSH
ssh-keygen -t ed25519 -C "winappdev@gmail.com"
# /home/dmitriano/.ssh/id_rsa_github
# and empty passphrase
nano .ssh/config
Host github.com
HostName github.com
IdentityFile ~/.ssh/id_rsa_github
stat -c %a ~/.ssh/config
chmod 600 ~/.ssh/config
“ping: socket: Operation not permitted” error on a clean Ubuntu 24.04 installation
ping did not work on my clean Ubuntu 24.04 installation showing the following error:
ping developernote.com
ping: socktype: SOCK_RAW
ping: socket: Operation not permitted
ping: => missing cap_net_raw+p capability or setuid?
Migrating a WordPress website from PHP 7.4 to PHP 8.3.6
After updated my WordPress to 6.7.1 and added the following to wp-config.php
define( 'WP_DEBUG', true );
define( 'WP_DEBUG_LOG', true );
and got the following error message:
Fatal error: Uncaught Error: Call to undefined function wp_kses() in /home/devnote/www/wp-includes/functions.php:6098 Stack trace:
#0 /home/devnote/www/wp-includes/functions.php(5579): wp_trigger_error()
#1 /home/devnote/www/wp-includes/class-wpdb.php(1333): _deprecated_function()
#2 /home/devnote/www/wp-content/sunrise.php(11): wpdb->escape()
#3 /home/devnote/www/wp-includes/ms-settings.php(47): include_once('...')
#4 /home/devnote/www/wp-settings.php(156): require('...')
#5 /home/devnote/www/wp-config.php(107): require_once('...')
#6 /home/devnote/www/wp-load.php(50): require_once('...')
#7 /home/devnote/www/wp-blog-header.php(13): require_once('...')
#8 /home/devnote/www/index.php(17): require('...')
#9 {main} thrown in /home/devnote/www/wp-includes/functions.php on line 6098
Creating Docker network for hosting legacy PHP websites
Running test Docker containers
sudo docker network create --subnet=172.20.0.0/16 legacy_net
sudo docker network ls
NETWORK ID NAME DRIVER SCOPE
61aa4a19ec0c bridge bridge local
7c0ebcfd4e3a dockovpn_default bridge local
79ed9c355254 host host local
99d8bde8e488 legacy_net bridge local
086455f026a8 none null local
