Last week I've shown you how to get started with IPtables and create and delete rules. This week I'm going to show you how to save the rules you write. This will ensure the rules you apply are re-applied once you reboot or restart IPtables. There are some rules which you may not want to persist. For example: if you temporarily block an IP address for guessing passwords, it's not necessary to keep the block forever. The IP...
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This tutorial is another part in a series of a security-related tutorials. This time, I'm going to talk about IPtables. IPtables is a software firewall that can filter out certain types of traffic. Mo...
Read MoreThere are many ways to remotely monitor your servers, but nagios is one of the most configurable and flexible ones. Once you have set up nagios, your localhost is being checked. But when there are rea...
Read MoreNagios is one of the most easy, expandable and trustworthy ways to monitor the status of your server(s). It is highly configurable and even lets you write your own plugins in whatever language you wan...
Read MoreA couple of weeks ago I started with the first tutorial in a series of security-related ones. This is the second tutorial in this series. Last time I spoke about SSH and sudo. As Raymii pointed out in...
Read MoreA couple of weeks ago, I wrote a tutorial on how to use duplicity to make encrypted, incremental backups over various available protocols. The process was a manual one, though, and would always requir...
Read MoreOne of the most important aspects of running a server is a good security policy. It is also one of the things that comes last, usually. But if you don't pay attention to it up front, it's going to cos...
Read MoreLast week I wrote a tutorial about routing IPv6 from a HE tunnel to VPS on Ubuntu. As promised, this week the CentOS version! A couple of weeks ago I wrote a tutorial where I explained how to set up a...
Read MoreA couple of weeks ago I wrote a tutorial where I explained how to set up a Hurricane Electric IPv6 tunnel on your KVM VPS. While this is a nice solution, it still requires the customer to fix somethin...
Read MoreIn my previous article about ansible, I gave a very basic introduction to it. After reading it, you were able to create your own playbooks and apply them to a single (group of) server(s). However, ans...
Read MoreIPv6 is a topic that has received a lot of discussion over the last couple of years. Although originally from 1996, IPv6 became more important and more implemented over the last few years because of I...
Read MoreBackups are about the most important thing about managing a server. If anything happens to your server, like data loss, a customer making a mistake (and accidentally removing data) or a full-blown ser...
Read MoreA common problem with managing multiple servers is keeping their configurations identical (or similar, depending on the purpose of the servers). When you set up a server (say server1), you tweak the c...
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There are many ways to remotely monitor your servers, but nagios is one of the most configurable and flexible ones. Once you have set up nagios, your localhost is being checked. But when there are rea...
Read MoreNagios is one of the most easy, expandable and trustworthy ways to monitor the status of your server(s). It is highly configurable and even lets you write your own plugins in whatever language you wan...
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So you think your OpenVZ VPS really has "guaranteed memory"? Well. Not quite. I have got an OpenVZ VPS from one of the providers listed here -- 256MB guaranteed and 512MB burstable memory. When I run...
Read MoreAny user of Version Control System? When I started as a programmer back in the 90's it was RCS. Then moved to CVS when I joined my first start up. About 5 years ago I moved everything -- work projects...
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One constantly posted question on LowEndBox and LowEndTalk is -- how to get the same setup as LowEndBox, a WordPress site that runs on cheap VPS with 80MB of memory? Instead of doing a step-by-step ex...
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Saw this discussion on WHT today when someone tries to confirm whether "32bit systems are better when it comes to memory management", and when it comes to low end virtual servers, which of 32bit or 64...
Read MoreWell. Not much cheap deals going on at the moment nor do I have anything useful to write about. So here is just some questions to ask everyone (that have been asked by one of the readers in the emails...
Read MoreJust a small tips for those trying to run multiple threaded applications on OpenVZ. Personally I code quite a few multi-threaded applications in Python (as some things are just too hard to do asynchro...
Read MoreIt was fun setting up your very own server. I remembered the time when I received the root password to my very first virtual server back in March 2006 ($22/month for a merely 192MB of memory), it took...
Read MoreEarly in June I posted RIP KT Ligesh of LxLabs, as the owner of LxLabs passed away leaving behind two great products that pretty much created this "low end virtual server" industry -- HyperVM and Klox...
Read MoreSaw quite a few visitors coming from Whirlpool.net.au, an Australian community forum, from a post asking about seedbox hosting. Now, the term "seedbox" was foreign to me until a few months ago. Accord...
Read MoreOne thing I hated about WebHostingTalk is how much bad advice the so-called "professionals" are giving out to the world. Some poor college student asked in the VPS forums whether he is able to run 18...
Read MoreA while a go I looked at Bash replacements for interactive shells. Unfortunately for me, I am just getting too used to having Bash on the command line and can't get myself used to other shells. Howeve...
Read MoreIt's actually a tip from Lincoln, who emailed me last month: Another idea is to replace bash (~4M/instance) with pdksh (~1M/instance). It doesn't sound like much, but if you're like me and you're have...
Read MoreGot your dirt cheap VPS with only 64MB guaranteed memory on OpenVZ? Want to move your WordPress blog from some insanely oversold shared hosting to your shining low end box? If you follow the "traditio...
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