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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...