Data Networking Blog
Blog for Admins
Daily Archives: February 5, 2015

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 DNS
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 Linux, Systems
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 Security
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 Security
Jd
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