Networking
Linux network troubleshooting and administration
CentOS 7 - Configuring Cacti
Install Required Dependencies yum -y install mariadb-server php php-cli php-mysql net-snmp-utils...
IPTables - Forwarding Between LAN and WLAN
Add the following to /etc/udev/rules.d/10-network.rules, substitute LAN_MAC_ADDR and WLAN_MAC_ADD...
Connecting to OpenVPN Using NetworkManager
Install the required packages sudo apt-get install network-manager network-manager-openvpn netwo...
OpenVPN - Firewall Configuration
FirewallD Use the following commands to open all ports required by OpenVPN: firewall-cmd --list...
RHEL VLAN and Bonding Configuration
Check list: Check whether the 8021q module has been loaded. lsmod | grep 8021q If the 8021q m...
Setup SFTP to Public Directory (/var/www)
Configuring SSH for SFTP vim /etc/ssh/sshd_config Comment the following line: Subsystem sf...
FirewallD - Opening a Port
Use this command to find your active zone(s): firewall-cmd --get-active-zones It will say eithe...
Using LetsEncrypt for OpenVPN WebSSL
Using letsencrypt for OpenVPN Access Server is nothing more than symlinking the files to letsencr...
Monitor Mode on Broadcom-wl Driver
Enable monitor mode: $ echo 1 > /proc/brcm_monitor0 Enabling monitor mode will create a pris...
SSH Tunneling
ssh -p <port> <username>@<remote host> -L <local listening port>:<remo...
Syncing Files with FTP
I came across a problem when doing migration last time, the server grew too big that I cannot jus...
ArchLinux - Setting Up Fortinet SSL VPN
Install ppp, openfortivpn and networkmanager's fortinet plugin package: sudo pacman -Syu ppp op...