• How to Test DNS Server Speed Using Online Tools

    Posted in Linux Network Admin Tips, Network Security Tips, Tech How To on Apr 05, 2022

    Having fast Authoritative DNS servers is very important today. Not only do they help the loading of web pages and make browsing websites faster. But, in addition, every email that gets sent by your domain has to be resolved quickly. In the early days of the internet all a mail server had to do is look for MX records and send the mail. Now a Sending Mail Server has to resolve DKIM, SPF, DMARC and maybe even BIMI records, not to mention checking blacklists. Not only that but EVERY "receiving" email server of your email has to resolve the same info. they check to see if the DKIM keys correct, was the Sender Authorized to send (SPF) and Do we need to report anything (DMARC). In order to eliminate errors in the DNS for your Domain, you need to host your DNS on a fast Anycast DNS platform.

  • How to protect your parked domains from spoofing

    Posted in Linux Network Admin Tips, Network Security Tips, Tech How To on Mar 29, 2022

    Most organizations today have more than one Domain registered. They may have a yourcompany.com domain, but then have similar domains registered such as a .net or .org domain name as well. Today, these other domains need to be protected from Spoofing as well. Domains that do not send emails can still be used in email spoofing or phishing attacks. You can protect your domain by adding SPF, DKIM and DMARC records that specifically tell other mail servers to reject mail from the domain trying to be spoofed. This will significantly make it more difficult for attackers to exploit these parked domains your organization may have.

  • How to Check DMARC Records with Online DIG Tools

    Posted in Linux Network Admin Tips, Network Security Tips, Tech How To on Mar 28, 2022

    Online DIG Tools are a great way to do a quick check of DNS records to see if you have any errors in your configuration. If you are a Linux guy you can simply open up a terminal window and run a DIG command. However there are some really good tools online that can even make it easier. If you do a search for "online DIG tools", you will find that the most popular are Google Toolbox, digwebinterface.com and diggui.com. If you notice in each of these tools there is no option to check DMARC. The following video will show you how to check any dmarc record really easy using these tools.

  • Create [email protected] and [email protected] for your Domain

    Posted in Linux Network Admin Tips, Marketing, Network Security Tips, Tech How To on Mar 09, 2022

    The [email protected] and [email protected] email accounts for your domain are very important. If you send out any amount of email you probably would like to monitor and see that your email is flowing properly. To monitor abuse and postmaster messages, add the people who should receive reports as group members, and set their subscription options. For example, you might want to add your legal or marketing team to the [email protected] group and your IT team to the [email protected] group. Receiving and acting on these email allows you to control and maintain the reputation and deliverability of your organizations email.

  • Protect Yourself from the asustor Deadbolt Ransomware attack

    Posted in Linux Network Admin Tips, Network Security Tips, Tech How To on Feb 22, 2022

    Recently the asustor NAS devices have been hit by an ugly ransomware attack called Deadbolt. How can you protect yourself for attachs such as the Deadbolt Ransomware attack? Asus is not the first to get hit with these types of attacks. WD MyBookLive, QNAP have also been hit recently and Synology is also susceptible to these types of attacks.

  • How to Setup Domain Email Forwarding Properly

    Posted in Network Security Tips, Tech How To on Feb 18, 2022

    A lot of small organizations and companies use the free email services of gmail, yahoo or outlook.com. However you should be driving customers to your domain email for a number of reasons. This video and article will show you how to set up domain email forwarding properly, and to still make use of the free email services of your choice.

  • Why you should setup DMARC right now!

    Posted in Linux Network Admin Tips, Network Security Tips, Tech How To on Feb 02, 2022

    The proper implementation of DMARC is a very important as it can be used to make your email flow better, give you the reports you require, and to provide you with better security. It is a necessity today for a number of reasons. If you have not implemented it yet, you should.

  • RSync vs RClone - What are the Differences?

    Posted in Network Security Tips, Tech How To on Jan 26, 2022

    We have been using Rsync for nearly 20 years here at Clustered Networks. Rsync is an excellent tool to synchronize data between a computer and a server or from server to server. RClone on the other hand has some unique features that make it a very useful utility. At Clustered Networks we use both RSync and RClone in our scripts that we run on a daily basis.

  • Install PHP Server Monitor on Ubuntu Server

    Posted in Linux Network Admin Tips, Network Security Tips, Tech How To on Jan 13, 2022

    PHP Server Monitor is a great litte program that checks whether your websites and servers are up and running. It comes with a web based user interface where you can manage your services and websites, and you can manage users for each server with a mobile number and email address or even have it notify your messaging service such as Pushover. It is similar to uptimerobot, uptime.com or site24x7.com but with more options and best of all OpenSource and Free!

  • How to Turn Off Spam Filtering in Yahoo Email

    Posted in Network Security Tips, Tech How To on Jan 06, 2022

    How to Turn Off Spam Filtering in Yahoo Email - Yahoo is a great email service. One of the problems with Yahoo Mail is that a lot of your incoming messages end up going to your spam folder. I know that Yahoo has very stringent email filters but this can become very annoying. In order to keep your email out of your spam folder all you really have to do is to create a "filter" to route all messages with an "@" symbol (which is all email) to re-route to your inbox.