Thanks God, we have just completed (6 months) Migration few Tomcat and TomEE application servers for PG / PP and Scorpion instances from old environment to a new one for a customer.
Though the separate instances of the old environment are being migrated, the overall design of the Current Mode of Operations (CMO) as they use to call it in corporate World and the Future Mode of Operations (FMO) has differences.
The each of applications on old environment is configured to run in Tomcat failover cluster (2 tomcats on 2 separate machines with unique IP addresses are running) and Apache Reverse Proxy is being used with BalanceMember apache directive in order to drop requests to Tomcat cluster to Tomcat node1 and node2. On the new environment however by design the Tomcat cluster is removed and the application request has to be served by single Tomcat instance.
The migration completed fine and in the beginning in the first day (day 1) and day 2 since the environment went in Production and went through the so-called "GoLive", as called in Corporate World- which is a meathor for launching the application to be used as a production environment for customer, the customer reported TimeOut issues.
Some of the requests according to their report would took up to 4 minutes to serve, after a bit of investigation we found out, that though the environment was moved to one Tomcat the (number) amount of connections to application of end clients did not change, thus the timeouts were caused by default MaxThreads being reached and, we needed to to obviously raise that number. Here is the old Apache RP config where we had the 2 Tomcats between which the RP was load balancing:
As we needed a work around, we come to conclusion that we just need to increase Timeout on RP first so on Apache Reverse Proxy we placed following httpd.conf Virtualhost ProxyPass (directive) configs :
Timeout 300 KeepAlive On MaxKeepAliveRequests 100 KeepAliveTimeout 15
Even though the developer tried to insist that the problem was in Reverse Proxy timeout config, they were wrong as I checked the RP logs and there was no "maximum connections reached" errors..
As you could guess what left to check was only Tomcat, after quick evaluation of server.xml, it turned out that the MaxThreads directive on old clustered Tomcats was omitted at all, meaning the default MaxThreads Tomcat value of 200 maximum connections were used, however this was not enough as the client was quering the application with about 350 connections / sec.
The solution was of course to raise the Maxthreads to 400 we were pretty lucky that we already had a good dedicated Linux machine where the application was hosted (16GB Ram, 2 CPUs x 2.67 Ghz), thus raising MaxThreads to 400 was not such a big deal.
Here is the final config we used to fix tomcat timeouts:
One note to make here is the debug="9" options to Connector directive was used to increase debug loglevel of Tomcat, and address="" is the local network IP on which Tomcat instance runs. As you see, we choose to use very high connectionTimeouts (because it is crucial, not to cut requests to applications due to timeouts) in case of application slowness.
We also suspected that there are some Oracle (ORA) database queries slowly served on the SQL backend, that might in future cause more app slowness, but this has to be checked seperately further in time as presently we were checking we did not have our Db person present.
There are plenty of security schemes and strategies you can implement if you're a Shared Web Hosting company sysadmin however probably the most vital one is to install on Apache + PHP Webserver SuPHP module.
# apt-cache show suphp-common|grep -i descrip -A 4
Description: Common files for mod suphp Suphp consists of an Apache module (mod_suphp for either Apache 1.3.x or Apache 2.x) and a setuid root binary (suphp) that is called by the Apache module to change the uid of the process executing the PHP interpreter to the owner of the php script.
So what SuPHP actuall does is to run separateCPanel / Kloxo etc. Users with separate username and groupid permissions coinciding with the user present in /etc/passwd , /etc/shadow files existing users, thus in case if someone hacks some of the many customer sites he would be able to only write files and directories under the user with which the security breach occured.
On servers where SuPHP is not installed, all systemusers are using the same UserID / GuID to run PHP executable scripts under separate domains Virtualhost which are coinciding with Apache (on Debian / Ubuntuuid, gid – www-data) or on (CentOS / RHEL / Fedora etc. – user apache) so once one site is defaced exploited by a worm all or most server websites might end up infected with a Web Virus / Worm which will be trying to exploit even more sites of a type running silently in the background. This is very common scenarios as currently there are donezs of PHP / CSS / Javasripts / XSS vulnerability exploited on VPS and Shared hosting servers due to failure of a customer to update his own CMS scripts / Website (Joomla, Wordpress, Drupal etc.) and the lack of resource to regularly monitor all customer activities / websites.
Therefore installing SuPHP Apache module is essential one to install on new serverslarge hosting providers as it saves the admin a lot of headache from spreading malware across all hosted servers sites .. Some VPS admins that are security freaks tend to also install SuPHP module together with many chrooted Apache / LiteSpeed / Nginx webservers each of which running in a separate Jailed environment.
Of course using SuPHP besides giving a improved security layer to the webserver has its downsides such as increased load for the server and making Apache PHP scripts being interpretted a little bit slower than with plain Apache + PHP but performance difference while running a site on top of SuPHP is often not so drastic so you can live it up ..
Installing SuPHP on a Debian / Ubuntu servers is a piece of cake, just run the as root superuser, usual:
# apt-get install libapache2-mod-suphp
Once installed only thing to make is to turn off default installed Apache PHP module (without SuPHP compiled support and restart Apache webserver):
# a2dismod php5 …
# /etc/init.d/apache2 restart …
To test the SuPHP is properly working on the Apache Webserver go into some of many hosted server websites DocumentRoot
And create new file called test_suphp.php with below content:
I'm responsbile for a project environment made up of 3 components which is occasionally dying. Here is a short raw overview of environment
Apache Reverse Proxy (entry door to app server)
Tomcat Server with an Application enabling web access
A Java Standalone application using SQLite database
The Tomcat and Java Standalone application is running on top of Windows 2008 RC2 Standard, the overall environment is becoming inacessible periodically and in order to solve that the customer decided to implement a daily Windows server reboot in my opinion this is very bad approach as it is much better to just set an auto reboot of each of components using few tiny batch scripts and Windows Taskmgr, however as the customer is king and decided to implement the reboot its their own thing. However even fter the daily server reboot was set once a week or so the application was becoming inaccessible and a Tomcat server restart was necessery as a fix.
Finally as a work-around to the issue, I've proposed the logical thing to automatically restart Tomcat once a day early in morning, here is how Tomcat auto Restart was implemented on the Win server:
1. Check out the name of running Tomcat service
First thing is to use the sc command to find out the Tomcat application name:
2. Create bat script to stop and start Tomcat service
Press keyboardWin-button + R, start notepad type inside:
@echo off sc stop Tomcat7_r2c && sc start Tomcat7_r2c
Don't be confused from screenshot that I have Tomcat7_MyApp instead of Tomcat7_r2c, but I made screenshot in hurry for another app. Save the file, somewhere (preferrably) in application folder/bin/ it is best to save it once with bat extension MyApp-Tomcat_Restart.bat and once as MyApp-Tomcat_Restart.xml (XML format file is later needed for import to Task Scheduler which understands .XMLs). The .bat file is good to have because it is useful to somtimes restart Tomcat manually by running it (in case of some sudden Tomcat Appserver occurs even though the auto-restart script).
3. Create new Task using command line (cmd.exe)
Task can be created also from command line using following syntax:
If you're using Linux as a Desktop system sooner or later you will receive an email with instructions or an html page stored in .mht file format. So what is mht?MHT is an webpage archive format (short for MIME HTML document). MHTML saves the Web page content and incorporates external resources, such as images, applets, Flash animations and so on, into HTML documents. Usually those .mht files were produced with Microsoft Internet Explorer – saving pages through:
File -> Save As (Save WebPage) dialog saves pages in .MHT.
To open those .mht files on Linux, where Firefox is availableadd theUNMHT FF Extension to browser. Besides allowing you to view MHT on Linux, whether some customer is requiring a copy of an HTML page in MHT, UNMHT allows you to also save complete web pages, including text and graphics, into a MHT file. There is also support for Google Chrome browser for MHT opening and saving via a plugin called IETAB. But unfortunately IETAB is not supported in Linux. Anyways IETAB is worthy to mention here as if your'e a Windows users and you want to browse pages compatible only with Internet Explorer, IETAB will emulates exactly IE by using IE rendering engine in Chrome and supports Active X Controls. IETAB is a great extension for QA (web testers) using Windows for desktop who prefer to not use IE for security reasons. IETab supports IE6, IE7, IE8 and IE9.
Note that because MHT files could be storing potentially malicious content (like embedded Malware) it is always wise when opening MHT on Windows to assure you have scanned the file with Antivirus program. Often mails containing .MHT from unknown recipients are containing viruses or malware. Also links embedded into MHT file could easily expose you to spoof attacks. MHT files are encoded in combination of plain text MIMEs and BASE64 encoding scheme, MHT's mimetype is:
I've personally always hated super markets from the very early days I entered one. Here in Bulgaria we've been somehow partly lucky not to have supermarket due to the different philosophy of the communistic regime in which we lived until 1991. The philosophy of then governing communist back then was to distribute food in local middle size or small stores owned by the government. The food has to be approved by governmental body and heavily checked if it matches the governmental set standards. The variety of food we were offered in the stores was very little. Most of the small stores (which were owned by the government) only contained basic products like;;;
bread, youghurt, milk, meat, butter, lemonade, beer and few more,
This was done probably intentionally and was a result probably of our long years Orthodox Christian faith which (has saved us and preserved over the centuries). Orthodox Christianity has always teached for simplicity. Even though the communist party rejected the faith and even did severe persecution against the Bulgarian Orthodox Church. The people on the top elite who were planning the communism had been a descent of an orthodox christian raised up living and therefore the philosophy of simplicity was inherited (even genetically) so the way the COM party behaved based on its leaders and the governing decisions about the nations belonging to communism (Russia, (Yugoslavia) – Serbia Koso , Bulgaria, Greece, Egypt etc.) were in a material expression in conjunction with the Christian tradition of simplicity (i say material because Orthodox Christian Church even visiting back then in the countries was usually prohibited and the Com. party did their best to ruin up the believe in Christ in people).
In communism the local suburb grocery stores, were the only "points" of distribution of food. Since buying and owning a car took at least few years of waiting and big money for it. Not more than 10 to 20% of families owned car and owning a car was considered to be granted mostly to people belonging to the then governing communistic elite or the Communist Party.
The public transportation was encouraged because according to communism so called "geometry" which was a main drive for how the systems in communistic countries should work it was estimated public transportation is cheaper and more environmental friendly than if a car is given to anyone, also public transportation (trains, bus-es) etc. did a good thing in the aim of the party to exersice higher control and surveilance over the population.
Because of that existence of big super-market was scarce and the culture to go and buy from a shop with your own family car was not existing.
The equivalent of nowdays mall shops (big retail stores) was usually located on the city center and the size of this shop was much smaller and the variety of products one can find there was only few. Hence the customer didn't have so much options to choose between, neither had to spend too much of time on choosing, the com party wanted the people to work more and buy less, so spending time in stores was not encouraged.
With the entrance of democracy and the moving up of large super-market food and good retails shops like Metro was among the first ones which entered the "freed" market. It was really a bizarre experience for us the ex U.S.S.R belonging people to enter such a large sized stores and to face such a big variety of choice.
Before that in communism we never saw such stores even on the TV, since the TV was governed by communistic party and only information which was useful for the establishment and protection of the regime was projected on the only available National TV channel.
Sorry to distract a bit from the major topic of this post, but I thought this is necessery to explain before continuing because it is important to understand that unintentinonally the communist gave us an advantage to have a different view on things than Western free world, a view which is in many things contrary and more correct (in terms of hard logic) than to Western Europe.
My first encounter with a super-market was only about 8 or 10 years ago and I believe many people who lived in the province of Bulgaria and other ex-communist countries did for a first time experience super-markets approximate 10y. ago. Though all looked so nice inside the shop and the shop emploees were so nice I always felt something very cold dead inside this big stores. Ptonsnlu my intuition (spirit) if you want has always pointed me out that there is something very wrong with this super markets.
With the increase of products on the market for us people who lived up to our 8 to 12 years (young age) in communism it was a great shock, since we were raised in a society based on some communist false ideology and suddenly the markets were opened and the products variety to choose between become extremely high. All previously said to be good and true in communism time was said to be anti-freedom and many people did their best to destroy as much as possible mostly everything somehow connected with previous communistic time. My homeland Bulgaria as a result of this become a very hard to live place and we were forced to adapt in fast paces and learn things on how we have to live like democrats for a very little short of time. One severe "damage" most of the growing people in Bulgaria in communism had was the hardness and inability to make choices. For many people between the age of 25 to 35 it is very hard to make choices even for small things. This was a direct consequence of a long years (45 years) of communist propaganda, and few generations who lived in a non-freedom respecting regime which conditioned and prepared a specific plan and place for every individual living in the country.
Seeing communism as the ultimate evil and manipulation to make us dependent we didn't know that in the free democratic world the manipulation and conditioning in society was heavy too.
"The Programming" of western society through institutions, stores and order in society was a fact and in a sense the only difference between the Democratic world and communistic world was one of the worlds seemed to have a larger frame in which the individual can work and live, whether the communistic regime seem to be more restrictive. One main thing used to condition people choices and buying behavior and make them over-consume to make the democratic economy constantly growth was big super-markets. Though they were privately owned and not like in communist country, the only drive behind each shop was PROFIT, PROFIT and agian PROFIT.
Higher profits would mean higher consumptions, higher consumptions means higher production and more work places opened as well as more expenses for working individuals would mean bigger necessity to work more and earn more, because though the sallaries incomes were high in the free world. The individual necessities there were even increasing too.
Since the about 1950s 1960s the super-markets started entering the "free" democrat countries world. As a result the small shops which were prior a main food and beverage distribution source started closing, because they couldn't be a concurrence to the big "brothers" super-markets which were able to buy higher quantities of goods in lesser price and therefore sell many of the goods in much lower prices than the little grocery stores.
The result with the years was a huge shift in people buying behavior from local groce and open markets to buy everything from the big super-markets. The big store chains had to be in a fight for customers all the time, so businesses involved started customer wars and tried their best to "steal" customers from each other. In this financial wars a main thing that most super-market chains and malls did was constant optimization of efficiency of both buying and reselling to the end customer. This is a 3 step business process actually.
1;;; They buy from the commodity producer 2;;; They prepare the food for the store (packaging, cleaning up whatever) 3;;; They put it in a certain way in the store and organize the store in a way to always sell more and more
As a result a huge number of tricks were employed by each and every super-market aiming to deceive the customer to ever buy more The deception of the client in store is very tricky and smart organized so it cannot really be called a lie but its rather a tricky smartness.
Since the super-markets entered in my country too and the tiny grocery stores are mostly closing unable to compete with the large super-market 'money making machines'. Even I am sometimes forced to buy stuff from super markets. Since here in Bulgaria the culture of purchasing from super-markets is not so strong yet. In order to be able to consume the little grocery stores. Many large super-markets started investing in making the little groceries their retail shops with their brand or (sometimes a new make up brand). By doing so the little grocery stores loose their authoritarity and independance and become dependant on the big super-market on the type of products they will sell, this obviously means this strategy of the big super-market in the long run will lead the little grocery stores we still have to ruin up. This is obvious because if the small grocery stores start selling the exact same products (brands) of the big super-markets, there will be nothing left to make the little grocery unique. Neither the variety of products choice inside or pricing will be any different from super-market. This will mean the tiny grocer will be no different from the big super-markets in terms of product and prices and therefore. The clients which now are loyal to small grocery stores like me will then have not such big motivation to buy from small super-markets, since everything inside is somehow similar (not to say) the same as with big supermarket the only difference would be the lesser variety which is obviously a good reason why the customer would definitely prefer to buy from the large supermarket …
On the videos you're about to see below, they explain some of the probably thousands of tricks nowdays existing the super-market chains employs to trick us to exponentiolly consume their goods.
Old Tricks of the SuperMarket Trade
As you can see the video is presenting a reality of the tricks which was used in the 1960 and now technology and knowledge in the field has largely increased and since they there are surely many new trick 'developments' which are working for the masses of customers daily. There is even a whole science centered on buying behaviour already existent called buyology!
Here is a short introduction to buyology to give you an idea what its purpose is:
Short introduction video on buyology – The Science of buying part 1 of 2
Short introduction video on buyology – The Science of buying part 2 of 2
Seeing all this is very precious information, since being informed one can escape the bad "tricks and traps" pawn in the markets.
All the information about the communistic regime and the 'shopping system' there was mentioned priorly because I wanted to explain a bit of the difference of then and now to point you to my opinion that the Western buying model and expectation to sell more based on the tricks are probably not working very well here in the ex-communistic countries, especially with the older generations and the one like me which somehow grow a small part of their youth in communism.
The reason is we have a different 'social programming' than westerners. Also the different spirituality (The orthodox Christian faith) plays another role. Also there is a difference in the type of buying behaviour. In Bulgaria there is no culture to buy once or twice per week. People have culture to buy daily, though this is starting to change slowly these days.
The topic is actually very huge and I'm sure what I'm saying is just the 'tip of the iceberg'. As I'm a firm opponent of big industries and large business I'm firmly against the buying from big stores any goods. The reason is that simply by doing so one makes the already RICH people even more RICHER. By increasing the richness of a certain small group of people daily, we as society are un-consciously somehow involuntarily letting them increase the financial control that is already there in some degree to the society. As democracy's main drive is money this means that by helping the large business-es marge and become even BIGGER, we're doing something against ourselves and our interests as society. I don't think that any ordinary citizen in the free world want to live in a fully controlled one World State (one world country), similar to the ex-communism I lived through, so I think people concerned about our freedoms should oppose the big businesses according to the society level they're in. Even if we're not in position to change things with money, we as society are in a position to change ourselves and our understanding of world, our desires and our behaviour. If we change our value system in a way, where money are not a top priority and the highest value the outcome will be positive in both spiritual terms and overall world state.
The modern day however wants us to falsely believe that we're divided, helpless and money dependent. This is a big delusion which we're constanty repeated. Just like with the super-market this big super-market company owners were able to convince us through time that super-market is better than the grocery stores, because of the less money spending advantage. Even if in the past there were possibility to spend less via supermarket nowdays spending less by using the supermarket instead of the small groce-store is a BIG LIE. Even if one spends less in super-market on certain products, the amount of related products he is cheated* to buy in store highly exceed the simply money one would spend on even higher priced products in the small groce. The outcome results from the super-market is also a big waste, as I lived in the west I've seen most of the households are buying more than they need, spending more than they need, cooking more food and more frequently than necessery and throughing large portions of food in the garbage (e.g. a huge amount of food waster).
If it was possible that people were aware they are buying all this non-sense food because of deception, they would have bought less, the super-markets would bought less and distribute less and the food (waster) remaining could be distributed to poor-er countries to help the starving kids and suffering people in Africa. Helping the suffering and starving, we would have helped each other as it is a nowdays well known that even on molecular level the whole world is connected, therefore helping our poorer brothers and sisters is actually helping ourselves ***
In my continous research on color programming I have come across an interesting interview with a Marketing Manager, who explains a few bits on why the super markets and big stores are designed the way they are.
Another typical things in super markets is the flower on the front doors, trying to make the impression to the customer of freshnes and mood UP. Then it comes the other things like the positioning of products. Many supermarkets put the fresh fruits and vegetables, either near the entry where the client walks in or at the end of the supermarket (this depends on the kind of customers targetted) and company policy and top managerial decisions.
As the short movie I post below mentions the baby products are positioned on a bit secluded place the reason is to invoke old time feelings to adults. Nowdays many supermarkets include also TVs playing cartoons so parents can leave the kids watch the cartoons and spend more time "pondering" what they have to buy for home and therefore buy more of goods (the reason is the kids are a common distractor and they could be a reason for the parent to buy quickly and leave the shop) and what actually is targetted in the shop is to customer to spend more time inside.
Longer stays in the shop means often more purchases and more money for the store. What really shocked me in the video is that as of time of writtings many shop chains have even an eye tracking devices with which they aim to track where the clients is watching (e.g. based on the feedback the shop can products can be re-ordered in a way to generate more sales profit).
The lightning in the shop is very important also the scent many shops have intentionally a separate department chopping meats or yellow cheese in front of the walking customers. Seeing fresh food makes the customer feel hungry so he might buy more.
The result of this secret tricks designed to make us consume more makes us a dumb un-thinking consuming society.
SuperMarket Psychology Entrances layout and Shelving
The science of "psychology in supermarket" is more developed in the west and we the Eastern Europeans were less exposed to buyer behaviour modification due to our belonging to the USSR communist Union and the existing of the "cold barrier" between communistic and democrats free economies.
Its my personal belief that more and more people should get aware of what is happening in super markets. I personally have never been a fan of super-markets since they're connected with amalgamation of business and always when I can I do buy food and goods from small district grocery stores.
It is my firm believe that buying from Malls and supermarkets is in future time to create more problems than goods since by doing so one helps the large business to become even larger and helps the merging of companies and therefore helps the creation of one new global communism based not on government ruling but on a tiny number of companies to own the world product creation distribution and selling …
Super Market Psychology – Few tips on how to shop "budget" friendly"
For two days now, I’m trying to set a custom DNS server for a (.net) domain purchased by gigaspark.com . Every time I try to change the nameservers for the (.net) domain an irritating error pops up, the error reads “nRRPResponseCode 531” and I cannot set my custom configured Bind DNS server for the (.net) domain. I believe the same problem happens also with (.com) domains.
In this relation, I tried googling online searching and searching what might be the stupid cause of the “nRRPResponseCode 531” error that prevents me from setting my custom configured Bind domain name servers to mydomain.net . I also contacted the support team from gigaspark multiply until I found out what is the trouble cause. In short the “nRRPresponseCode 531” is an error that indicates your .net or .com domain is not figuring in VeriSign’s GRS domain database . The Verisign GRS domain database contains a list of DNS servers that are correctly configured and trustworthy enough. I’ve seen many people online suffering from the same terrible error, who pointed out that the error is caused by misconfigurations in the Bind DNS server or the zone file for the problematic domain name, though I’ve looked through multiple times to possibly track the problem in both my major named.conf and the rest of bind’s configuration files as well as in the domain name I had registered mydomain.net ,there was nothing misconfigured or unusual. I have to admit, this problem is really odd, because I was able to successfully set the same custom configured Bind DNS server for mydomain.info and mydomain.biz but, yet whenever trying to set the same Bind DNS for mydomain.net I came across the shitty nrRRPResponseCode 531 . Thanks to the kind help of Gigaspark’s tech support together with some google posts on the matter I figured out Gigaspark are using ENOM – a major domain name registrar offering easy ways for an end domain providers to become their resellers. It seems ENOM’s policy is enforces you as a domain name customer to register your full DNS domain name let’s say (ns1.mydns.com) in Verisign’s GRS domain database otherwise they refuse you the right to set yourself your ns1.mydns.com for your domain, because if the DNS domain name is not figuring in that database it’s not trust worthy! I believe many people would agree with me this is a real shit! You pay for your domain and you should have the full rights over it. I mean you should be allowed to set whatever DNS domain name even, if it’s not an existing one and they shouldn’t bother you with stupid DNS domain name registrations in stupid Verisign GRS databases and so on! Now you probably wonder what is the required steps to take to be able to register the domain in that Verisign GRS database in order to be able to set your ns1.mydomain.com as a default DNS server for your mydomainname.com . Well you have to contact your domain registrar, let’s say gigaspark.com . You log to your account on tucowsdomains for your domain mydomain.com … then you find something similar to: “register a nameserver” among the overall menus options. Then you have to register your nameserver ns1.mydomain.com. Then you wait between 24 up to 48h and then you have to test if your NS has already properly entered the Verisign GRS database you have to visit on Verisign GRS Whois . Hopefully the guys from Verisign GRS would approve your DNS host to enter there database and then at last you might be able to set in your DNS host as a preferred DNS for your (.net) / (.com?) domain name. So go back to gigaspark’s slovenian interface and try changing the DNSes once again! If you’re lucky with God’s help (for sure), you would be at last be successful in setting your BIND name server as a primary DNS.
The day started a bit normal. I did my morning excercise, then I prayed. I spoke with Dzemil (A macedonian colleague of mine) and we set up a meeting for 12:30, I ate. I received few calls from the office with requests to do few little things. At 12:30 I met Dzemil at the College restaurant. We spend some time talking with him and another turkish colleague. Then we went to speak with Bozhidar Bozhkov about the applications for Holland, what is the procedure of transfering from the college here to Arnhem Business School etc. Laters I went home and did some work on the servers and red and did my fourth cisco test. I went to my cousin and after that went to Javor, we went out with Ina and Javor for a coffee to Kukla. Afterwards I went home and played with Dynamips. For all that wonder what the hack Dynamips is. Well Dynamics is a Cisco emulator just like VMWare is an OS emulator with the exception that Dynamics is builded to run only Cisco’s IOS. I found that nice Video tutorial Cisco Router Emulation Software Dynamips Video Tutorial, check it out here Here . Since I needed a Cisco IOS image and I’m not a Cisco customer I used torrents to download a collection of Cisco ISO’s and used one of the isos to make it work on my Windows Vista. I have problems running it because of lack of permissions, caused by the famous UAC ( User Access Control ). The solution for me was to use a privileged command prompt and start, both the Dynamips sever and my custom configured simple1.net which connected to the server and loaded the cisco image. There is also a very nice and extended tutorial on the topic of Dynamips it’s located Here . Alto today tested the previously installed Wireshark. Wireshark is a very nice substitute for iptraf for windows it has a nice and easy to use graphical interface, supports capturing and has lot of traffic analysis possibilities I strongly recommend it to anyone coming from a Linux/BSD background like me and searching for a nice Windows substitute for iptraf. Check out wireshark on the following URL . Now I’m going to change the topic and say a few words for my spiritual state. Today it was a hard day. I was tempted by the devil to think bad thoughts and did sinned for which I search forgiveness. Life it so hard I realize it more and more day by day. Very often old spirits which tormented me for a long time are trying to come back. I haven’t smoked today also and again thanks for that should fly to God who delived me from this terrible vice. As a conclusion I should say that for everything I should thanks to God and pray for him to forgive my unfaithfulness. END—–
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