Wake-On-LAN (WOL) is a very useful feature if you have got a LAB at home and want to make it energy efficient. I have written a small BASH script to automate the Wake-On-LAN (WOL) procedure which can be used in an instance where there is a ESXi server which can turned on as and when required and then shutdown when not needed. Believe me it saves a lot on electric bills as the Servers are not running 24/7 and powered on only when required.

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It’s possible to enable DNS forwarding using BIND and including reverse lookup for the zone. Once you are done with the config of a basic bind server, all you need to do is configure "/etc/bind/named.conf.options and conf.local" with the following options and restart the service.

In this example we have got 2 DNS server's resolving.

SERVER1 = raspi-qud.hm.local = domain : HM.LOCAL : IP:

SERVER 2 = viz-raspi-st.dev.local = domain : DEV.LOCAL :IP:

We need to resolve local requests for "hm.local" on SERVER 1 and forward any "dev.local" domain requests (forward and reverse lookups) to SERVER 2 and hence need to configure SERVER 1  to achieve this.

To start with add the zone dev.local to "/etc/bind/named.conf.local" and add the forward zone to the config file.

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If you can't spend thousands for a static IP, Try out this script which sends out an email alert whenever Public IP address changes. In a situation where you need a VPN solution without spending thousands on a static IP no matter if you are a HOME user or a Small Business owner, all you need to have is a RasberryPi and a decent Small Business VPN Router. For this article I used a Cisco RV110w VPN Router.

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