Read this before buying iCloud storage
Your iPhone or iPad is probably going to run out of storage eventually. To counter this, iCloud lets you back up and store important data using the cloud instead.
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How to fix Minecraft exit Code 1 on Windows
Minecraft is still one of the most popular games on the planet, but it’s far from perfect. Sometimes the game will crash with the “Exit Code 1” error, leaving it in an unplayable state. Fortunately, it’s a common issue, and we will show you how to fix it in no time.
[mai mult...]Cum stergi randurile goale in Excel
Atunci cand avem un tabel in Excel cu linii goale le putem sterge foarte rapid folosind 2 combinatii de taste.
[mai mult...]How many Tabs does it take to slow down your Browser
There’s no denying that browser tabs are a divisive topic. Share a screenshot of your desktop with more than 10 tabs open, and you’ll undoubtedly get comments about it. But do all of those tabs actually do any harm to your browser’s performance?
It feels like sound logic to assume that the more tabs that are open in your browser, the harder it has to work. Therefore, performance should be negatively affected if you constantly have dozens of tabs eating up resources. That’s not necessarily the case, though. Modern browsers have some cool tricks up their sleeves.
[mai mult...]How to check your MacBook’s Battery Health
Computer batteries have a limited lifespan and degrade over time, so they’re often the first thing to go on a MacBook. You can replace a MacBook’s battery yourself or pay Apple to do it, but you’d want to check its health first to know whether it’s the right time to do so.
[mai mult...]Tutorial: creating a UFW Rule for DNS access from a specific IP
UFW (Uncomplicated Firewall) is a straightforward tool for managing firewall rules on Linux systems. If you want to allow DNS access only from a specific IP, you can do so by configuring a specific rule in UFW. Here’s how:
Step 1: Install UFW (if not already installed)
If you don’t already have UFW installed, you can do so using the following command in the terminal:
sudo apt install ufw
Step 2: Enable UFW
If UFW is not already enabled, you can do so using the command:
sudo ufw enable
Step 3: Adding a Rule for DNS Access
To allow DNS access only from a specific IP (let’s assume the IP address is 192.168.1.100), use the command:
sudo ufw allow from 192.168.1.100 to any port 53
This command allows traffic from the specified IP address to any destination on port 53, which is the standard port used for the DNS service.
Step 4: Checking the Added Rule
You can check the added rule using the command:
sudo ufw status
This will show you a list of all active UFW rules.
Step 5: Testing DNS Access
Finally, you can test whether the rule is working as intended. You can use a command such as nslookup or dig to test DNS access to an external DNS server from the specified IP address.
Make sure to replace the IP address specified in the command sudo ufw allow from 192.168.1.100 to any port 53 with the IP address you want to allow DNS access from. Also, verify and adjust any other settings or ports as per your specific needs.