Author: Andrey Mikhalchuk

Andrey Mikhalchuk is and IT professional with broad specialization in different areas on modern information technology sceinces. Andrey has summa cum laude masters degree obtained in Moscow State University named after M.V.Lomonosov, leading Russian University. Currently Andrey is a co-founder and Chief Technology Officer of MineStream Software Company.
Posted in Other Travels

Immigration to Australia

I started republishing posts from my old website about immigration to Australia. First few posts are available here, more are coming later. All posts are in Russian. All posts are not published on the first page.

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Posted in Other Tools

Simple free online IP conversion tool

For debugging purposes I frequently need to quickly convert ip addresses from one representation to another. Here is quick and dirty (I’ll cleanup the interface when get some free time) converter that does the job. If you don’t see the form below because of some reason please proceed to this…

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Posted in Linux Software

How to improve NFS performance (Linux, OpenSUSE 10.3)

When I used NFS first time 15 years ago on Sun it seemed to me the top of progress. And it really was at that time. So dealing mostly with samba during last few years I forgot how actually NFS works until a few days ago when I issued standard…

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Posted in Other

Reservation Rewards aka WebLoyalty – Problem Solved

Recently I’ve got $10 charge from company called “Reservation Rewards” … I’ve seen this company before in one of those “Use your chance to get $20” with really long explanation that hides the fact you have to subscribe to “Reservation rewards” for $12/month in order to get those $20. But…

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Posted in Web

Interesting Google Webmaster Tools Misfeature (Re:Sitemap)

I recently uploaded a sitemap for a new website to google and It looks like google webmaster tools do not accept sitemap containing just single url. The error it reports is “Missing XML tag”.

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Posted in Linux Software

How to configure master/slave DNS servers so they do not conflict with Plesk 8.2

When you need to implement a DNS master/slave relationship, you obviously can go ahead and edit named config files, but when you do next change to DNS configuration using Plesk most your changes will be lost. From the other side Plesk doesn’t provide slave server configuration at all! Here is…

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Posted in Linux Software

How to enforce POP3s by disabling POP3 in courier-imap pop3 server

Sometimes, for security reasons, it is useful to disable pop3 protocol on a server, leaving users with necessity of using secure pop3 protocol (i.e. in outlook they will have to check “Use SSL checkbox”, otherwise mail just won’t work). The civilized method is of course just ask people politely to…

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Posted in Linux Other Software Windows

How to check if your POP3 server works normally

When your mail is not working it is important to know exactly what part is broken (so you know if you should go blame sysadmin or just check your mail client settings). Let’s simulate basic POP3 client using regular telnet (enter commands without quotes) in order to check if the…

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Posted in Linux Software Windows

“553 sorry, that domain isn’t in my list of allowed rcpthosts; no valid cert for gatewaying” problem solving for Outlook, macmail, Plesk 8.2

“553 sorry, that domain isn’t in my list of allowed rcpthosts; no valid cert for gatewaying” There could be many things leading to the problem. One of them is client inability to authorize to SMTP server. Here’s a quick explanation of what happens and how the problem could be solved.

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Posted in Linux Software Web Windows

How to purchase an SSL ceritficate for your website (using Plesk 8.2)

Despite the process of obtaining an SSL certificate for your website is not very difficult it may take you plenty of time, because the price of mistake could be rather high. I’d say you can loose hundreds of dollars if you buy wrong type of certificate or get it from…

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Posted in Other

Hello World!!

Howdy! This blog is about various technical stuff like coputers, gadgets, photos etc etc. Enjoy

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