I forgot I had German in the morning so I get to sleep at 3:00 a.m. In the morning my mother wake me up to ask my did I have lectures. I said yes in 10:00 then I rembembered about the German. I tried as fast as possible to stand up wash my teeths and go to the college. After the German we had some Introduction to Management classes. One of our programmers Pesho called me and said we have a problem with few of the scripts setupped to be run on crontab on one of the servers, then also the other programmer Milen called and said he had a problem with some other script which loops one of the webservers … having problems is really unpleasant. At least I’m not so sleepy as I should be for the small quantity of time I’ve slept in the night.We went to a coffee with Narf and Nomen in the lunch break after that Management again. And now I’m doing some stuff on the servers. I’m little tired now and maybe I’ll sleep. Praise the Lord for I’m spiritually okay most of the time today. Thanks God :]END—–
Posts Tagged ‘lunch break’
Tags: coffee, crontab, god, introduction to management, lunch break, management classes, Narf, nomen, programmer, programmers, scripts, servers, sleep, teeths, time today, webservers
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Speed up your DNS resolve if your Internet Service Provider DNS servers fail or resolve slowly / Privacy concerns of public DNS services useWednesday, March 30th, 2011
In my experience with many network Internet Service Providers by so far I’ve encountered a lot of DNS oddities and therefore surfing (web) and mail slowness.
It’s sometimes very irritating especially in cases, when I use my internet over Wireless public or university wireless networks.
In principle many of the Wireless routers which distribute the internet especially in organizations are badly configured and the slowness with DNS resolvings is an absolute classic.
If you haven’t encountered that slowness in opening web pages when connected from your University’s canteen, whether it’s fill with people for the lunch break, then I should say you’re really lucky!
My personal experience with this bad configured devices DNS services has been quite negative and every now and then I use to set and use public DNS servers like OpenDNS and Google DNS
Very often when I connect to a wireless network with my notebook running Debian Linux and the internet is too slow in opening pages I automatically set the Google or OpenDNS servers as a default DNS IP resolving servers.
1. DNS IP addresses of Google Public DNS are:
2. OpenDNS Public DNS servers has the IP addresses of:
I do set up and use the upper public DNS services addresses via the commands:
3. Set and use Google Public DNS services on my Linux
debian:~# cp -rpf /etc/resolv.conf /etc/resolv.conf.orig
debian:~# echo "nameserver 126.96.36.199n nameserver 188.8.131.52 n" > /etc/resolv.conf;
I first create backu pof my resolv.conf under the name resolv.conf.orig just to make sure I can revert back to my old DNSes if I need them at some point.
If you prefer to use the OpenDNS services for some let’s say privacy reasons, you do it in the same manner as in the above commands, you only change the IP addresses. 4. Configure and use the OpenDNS public DNS services
debian:~# cp -rpf /etc/resolv.conf /etc/resolv.conf.orig
debian:~# echo "nameserver 184.108.40.206n nameserver 220.127.116.11 n" > /etc/resolv.conf;
Of course using Public DNS services has it’s disadvantages over the domain resolving speed up advantage.
One major issue is that Public DNS services are running on a top of a cloud and if you have red my previous article Cloud Computing a possible threat to users privacy and system administrator employment you might be agaist the idea of using a services which are powered by cloud.
The other primary concern is related to your SECURITY and a PRIVACY by using Public DNS networks, you risk that your Public DNS provider might use some DNS spoof techniques to mislead you and resolve you common domain names which usually resolve to let’s say 18.104.22.168 to let’s say 22.214.171.124
Even though this kind of practices on a side of a public DNS provider is not a likely scenario the possible implications of Public DNS providers using DNS forgery to fool you about domain names locations is a very serious issue.
As public DNS providers does contain again the good old philosophy of cloud computing embedded in themselves and they strive to become some kind of a standard which people might vote to adopt and use, the future implications of a wide adoption of Public DNS servers might be a terrible thing on internet users privacy!!!
Just think about a future scenario where we users of the Internet are forced to use a number of public DNS servers in order to use the Internet!
Usually a very huge companies are possessing the Public DNS services and do pay for the tech equipment required for building up the cluster clouds which provide the DNS services and therefore, if in the short future public DNS becomes a fashion and (God forbid!) a standard which shifts up the regular ISP DNS servers to resolve domains to IPs then it will be terrible.
The corporations which does own the Public DNS service/s might have a direct control over filtering and censoling information posted on any website on the internet.
Even worser if the world decides to adopt public DNS services somewhere in the future this means that large corporations owning the open dns cluster or clusters will be able to check each and every resolving made by any user on the net.
If you think closely such an information possessed by a company is not the best thing we want.
So let me close up this article, I’m not a fan and an evangelist who preaches the use of Public DNS services. Right on Contrary I do honestly hate the idea behind public DNS.
Nevertheless apart from my personal opinion I’m a practical person and using the public DNS servers every now and then when this will accelerate my access to the internet is still an option I do enjoy.
Maybe it’s time for a free software project (a tor like), which will provide users with an OpenDNS alternative which will run on hobbyist computers around the globe (just like with tor).
What’s rather funny is that the loud name OpenDNS is a big lie in reality OpenDNS is not opened it’s a company owned closed source service 😉
Tags: backu, break, canteen, Cloud, configured devices, course, default, DNS, dns ip addresses, dns services, google, information, internet service provider, internet service providers, Linux, lunch, lunch break, mail, nameserver, network internet, oddities, OpenDNS, orig, origdebian, personal experience, pof, Privacy, privacy concerns, privacy reasons, public dns servers, resolv, rpf, scenario, Service, Set, slowness, wireless networks, wireless routers
Posted in Linux, Linux and FreeBSD Desktop, System Administration | 1 Comment »