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Data Networking Blog
Data Networking Blog
Blog for Admins
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There are multiple ways to backup your systems and data and the one you choose to implement depends on many different factors such as the OS. Today we are looking at rsync utility to backup important data. I am not going to perform a full backup of my system as it is easier for me […]

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February 6, 2015 Uncategorised
Jd

You can cause yourself a lot of problems if you do not understand the difference between a recursive and non-recursive (iterative) DNS servers and when to use each. I will attempt to explain what each means and scenarios when you will be using recursive or non recursive setup. A DNS server configured to be recursive […]

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February 6, 2015 Uncategorised
Jd

If you are an administrator for a company or just looking after some personal servers, you will soon realise that it is important to properly manage your log files. Log files give you important information about the health and security of your system. If you have not planned for log management then chances are you […]

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February 6, 2015 Uncategorised
Jd

Glue records is a concept I was not familiar with till I decided to host my personal domain just for the purpose of learning. When you buy a domain you have to define your name servers. For example, you buy a new domain example.com and the name servers authoritative for this domain are: ns1.example.com and […]

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February 5, 2015 Uncategorised
Jd

Updating systems is an important part of day to day administration. Normally you plan your updates and check compatibility with a lot of other software running on your server before applying updates so if you are thinking about auto updating a critical server then I would advise against it. Why? There are a lot of reasons. […]

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February 5, 2015 Uncategorised
Jd

OK so you have followed my post “Securing SSH with fail2ban on CentOS” and still can’t get it to work ? No worries I had the same problem and this post outlines how I fixed it. After installing fail2ban I deliberately tried a few failed log-in attempts from another machine and realized it was not […]

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February 5, 2015 Uncategorised
Jd

OS: CentOS 6.6 Final Version I recently came across fail2ban program while i was trying to harden the security of my CentOS Server. Fail2ban allows you to block IP addresses that register too many failed login attempts to your SSH service which indicates a brute force attack. If you allow such attempts on your system […]

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February 5, 2015 Uncategorised
Jd
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