Finding Maximum frame size on the Network : PING makes it easy

1.   We know how to get the IP address of any website...we simply need to ping it.For example if we need to know the IP address of a website ie www.somesite****.com...then we only need to ping it....like shown in the screen shot below :

2.   So we get the IP address of the web site at www.somesite****.com as *.*.*.*....But if we need to know the maximum frame size that this can handle...what's the way out ?...ping will be able to assist us here too...we need to add some switches to it...so the next command goes like :

ping www.somesite****.com -f -l 1500 and we get this as the output :

3.   The display Packet needs to be fragmented but DF set means that the frame is too large to be on the network and needs to be fragmented.Since the -f switch is used,the packet was not sent and the ping command returned with this error.

4.   Now instead of 1500...type the same command with the attrib as 1300 like ping www.somesite****.com -f -l 1300

5.   So here we have got a bracket of size ie the maximum packet size is more than 1300 and less then 1500 bytes...so keep trying with values between 1300 and 1500 till ur reach the exact breaking point wherein the message in the ping display changes...so here the border line at which the message changes is shown in the screen shots below :

6.   So for the given www.somesite****.com ,the maximum frame size on the machine network is 1472 bytes....

7.  If you wanna try this in your network,then the 1300-1500 set that I have used may be different...so first you need to figure out those boundaries yourself!!!!!

Wanna sync Two Harddisks / Two Folders : GRSYNC is there for you!!!!

1.   I have two harddisks of 500 gb and I have loads of data in both...but i could never find out time to set my data at one place and then make a clone kindda or a bakup of the other...it is a herculean task if you keep updating your one harddisk regulary...so the crude rule says that you must copy the updated folder to the backup drive and then keep replacing the older one's....but if the data is too much and the files are in thousands and you have lesser time wouldn't you like to simply click one button and auto syn the complete folder or the harddrive at one go!!!!!What if you have the following GUI that give a whole lot of options to play around...like in the screen shot below :

 

 

2.  Isn't this simple and great...no need to bug yourself trying to find what was old and what is newer...what to keep and what not to keep... you simply see the options above and you will be able to figure out how helpful this utility can be if u have not been suing this till date....The best part is that it is very simple to use.

3.   Grsync is a Graphical User Interface (GUI) for the rsync synchronization tool under Linux / Unix System. There are also ports of Grsync on Windows and OS X platforms. Grsync is released under the terms of the GNU General Public License (GPL), so it is free software, and makes use of the GTK+ UI toolkit. In addition, it has support for the Unity user interface. It can be effectively used to synchronize local directories and supports remote targets (although in a limited way).

How do u install this in FEDORA ?

 4.   A simple type yum install grsync with root privileges will do the needful.....

Reduce Tracking/Increase Privacy : Start Mozilla in PRIVATE MODE by default

1.   Earlier in one of my posts I had shown on how to start chrome in "INCOGNITO" mode to avoid any cache storing and also at the same time remove cookies at the end of the session....the following steps make way to start the mozilla browser by default in a private mode.

2.   As shown in the screen shot below...go to the Edit drop down menu and select preferences and then go to the privacy tab and select NEVER REMEMBER HISTORY

(Click on the image to enlarge)

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 3.     The video cast below :

If u r Google Service User : Don't EXPECT any Privacy@MISINTERPRETED!!!!!

1.    For about last 4-5 years ,we have come across many debates about how so many companies are minting our private data and associating that with third parties to create a profile based marketing environment in and around the naive user....and except for the few white papers about the technicalities involved in doing this ...max of the companies had denied mincing with privacy..but actually they were just mincing with words to have their way inside the privacy den of each user!!!!and now the big revelation from Google comes as part of small news...and that says 

"Google Tells Court You Cannot Expect Privacy When Sending Messages to Gmail -- People Who Care About Privacy Should Not Use Service"

But it seems that the meaning has been mis interpreted....

The complete extract available here at http://www.consumerwatchdog.org/resources/googlemotion061313.pdf

2.      Isn't it a big news otherwise!!!!but the news has been put across the web as just a small snippet news....

"Just as a sender of a letter to a business colleague cannot be surprised that the recipient’s assistant opens the letter, people who use web-based email today cannot be surprised if their communications are processed by the recipient’s ECS provider in the course of delivery. Indeed, “a person has no legitimate expectation of privacy in information he voluntarily turns over to third parties.” Smith v. Maryland, 442 U.S. 735, 743-44 (1979). In particular, the Court noted that persons communicating through a service provided by an intermediary (in the Smith case, a telephone call routed through a telephone company) must necessarily expect that the communication will be subject to the intermediary’s systems. For example, the Court explained that in using the telephone, a person “voluntarily convey[s] numerical information to the telephone company and ‘expose[s]’ that information to its equipment in the ordinary course of business.” 

 3.      Now this declaration by Google has two connotations : one from point of view of a user who is only concerned about his private life,his social exchanges with friends,relative and office staff...and then the other point of view has a deeper meaning to it.The line highlighted above has been widely misinterpreted to make it seem like Google is saying Gmail users have no expectation of privacy when they use Gmail. To clarify and paint a better picture,Google's argument is about non-Gmail users who haven't signed Google's terms of service. It's right there in black and white — the heading for the section literally starts with the words "The Non-Gmail Plaintiffs."

 4.     But that does not mean the gmail users can take a back seat and relax about being safe again...the issue is too complex to have a clear cut YES...OR NO....the surfing goes on.....

Being CEH : Certified Ethical Hacker V8

1.    After CCCSP,,my efforts to clear a EC-Council exam finally paid off....and today I passed my CEH V8 exam....the feeling of being a CEH is yet to set in...but yess!!!it feels good to clear a exam which has good repu in the security world....one thing I would like to share is that though the exam covers nearly all domains and spheres of security and hacking but still ,end of course does not mean that a guy can hack into any site and create havoc...but yess it does make you understand the nuts and bolts of how one can do it...and more importantly from a CEH point of view...what and where are the vulnerabilities?

2.  CEH is all about offensive hacking.The amount of tools that are available today in the open source world is mind boggling...and the best part is the course ware that the student gets...its great!!!!I can just say that...it all comes with a set of 6 CDs which have thousands of PDFs and tools.If one starts doing each and every practical aspect of this course-ware it will take more than a year to assimilate and do it on a VM platform...so that is definitely going to keep me busy.The best part is that all this is explained with screen shots and step by step instructions.

3.   As i keep doing these practicals on my VM...will try certainly uploading and sharing with you guys!!!!will get my hard copy of the certificate in a few weeks from now...anxiously waiting!!!!