Desires

Desires

Desires

The wish to acquire something

Some specific yearnings

Desires

Every attempt should should have the strength

To rend seas asunder

Desires

Rip the storms

And seize your destination

Let your heart’s desires blossom

And your hopes smile

Now nothing is difficult

Nothing at all

 

o ho o...

 

Let your happiness soar

And take you with it

To paradise

Where your every wish is fulfilled

Let your heart’s desires blossom

And your hopes smile

Now nothing is difficult

Nothing at all

 

Desires

Hope every night passes thus

Where you get to talk to your desires

Desires

Take the fire from the sun

And sing your own song

Desires

Do something with your life

that pleases even the Gods....

Some of my drawings on batting mastero sachin tendulkar ..hope you like it :)

Some more Clicks !!...:)

Ranjan's Photography...

This diwali i thought of a little gift for myself ..a nice DSLR camera whcih will help me to improve my creativity and photography skills and fortunately i found a "Canon EOS 1000D / Rebel XS "in a shop near my home and without any second thought i bought it.

Photography is wonderful and is my new found hobby. This a small collection of various photos I have ...hope you guys will like it ..:)

ಕನ್ನಡ ರಾಜ್ಯೋತ್ಸವದ ಹಾರ್ದಿಕ ಶುಭಾಶಯಗಳು !!.

ಎಲ್ಲಾದರು ಇರು ಎಂತಾದರು ಇರು ||೨||

ಎಂದೆಂದಿಗೂ ನೀ ಕನ್ನಡವಾಗಿರು
ಕನ್ನಡವೇ ಸತ್ಯ, ಕನ್ನಡವೇ ನಿತ್ಯ

ಕನ್ನಡ ಗೋವಿನ ಓ ಮುದ್ದಿನ ಕರು ||೨||
ಕನ್ನಡತನ ಒಂದಿದ್ದರೆ, ಅಮ್ಮಗೆ ಕಲ್ಪತರು
ಕನ್ನಡವೇ ಸತ್ಯ, ಕನ್ನಡವೇ ನಿತ್ಯ
ಎಲ್ಲಾದರು ಇರು ಎಂತಾದರು ಇರು
ಎಂದೆಂದಿಗೂ ನೀ ಕನ್ನಡವಾಗಿರು

ನೀ ಮೆಟ್ಟುವ ನೆಲ, ಅದೆ ಕರ್ನಾಟಕ
ನೀನೇರುವ ಮಲೆ ಸಹ್ಯಾದ್ರಿ
ನೀ ಮೆಟ್ಟುವ ನೆಲ, ಅದೆ ಕರ್ನಾಟಕ
ನೀನೇರುವ ಮಲೆ ಸಹ್ಯಾದ್ರಿ

ನೀ ಮುಟ್ಟುವ ಮರ ಶ್ರೀಗಂಧದ ಮರ ||೨||
ನೀ ಕುಡಿಯುವ ನೀರ್ ಕಾವೇರಿ

ಪಂಪನ ಓದುವ ನಿನ್ನಾ ನಾಲೆಗೆ
ಕನ್ನಡವೇ ಸತ್ಯ
ಕುಮಾರವ್ಯಾಸನ ಆಲಿಪ ಕಿವಿಯದು
ಕನ್ನಡವೇ ನಿತ್ಯ

ಎಲ್ಲಾದರು ಇರು ಎಂತಾದರು ಇರು
ಎಂದೆಂದಿಗೂ ನೀ ಕನ್ನಡವಾಗಿರು

ಹರಿಹರ ರಾಘವರಿಗೆ ಎರಗುವ ಮನ
ಹಾಳಾಗಿಹ ಹಂಪೆಗೆ ಕೊರಗುವ ಮನ
ಹರಿಹರ ರಾಘವರಿಗೆ ಎರಗುವ ಮನ
ಹಾಳಾಗಿಹ ಹಂಪೆಗೆ ಕೊರಗುವ ಮನ

ಬೆಳ್ಗೊಳ ಬೇಲೂರ್‍ಗಳ ನೆನೆಯುವ ಮನ

ಮಲೆನಾಡಿಗೆ ಹೊಂಪುಳಿ ಹೋಗುವ ಮನ
ಕಾಜಾಣಕೆ ಗಿಳಿ, ಕೋಗಿಲೆ ಇಂಪಿಗೆ
ಮಲ್ಲಿಗೆ ಸಂಪಿಗೆ ಕೇದಗೆ ಸೊಂಪಿಗೆ
ಕಾಜಾಣಕೆ ಗಿಳಿ, ಕೋಗಿಲೆ ಇಂಪಿಗೆ
ಮಲ್ಲಿಗೆ ಸಂಪಿಗೆ ಕೇದಗೆ ಸೊಂಪಿಗೆ

ಮಾವಿನ ಹೊಂಗೆಯ ತಳಿರಿನ ತಂಪಿಗೆ

ರೋಮಾಂಚನಗೊಳ್ಳುವ ಮನ
ಕನ್ನಡವೇ ಸತ್ಯ, ಕನ್ನಡವೇ ನಿತ್ಯ
ಎಲ್ಲಾದರು ಇರು ಎಂತಾದರು ಇರು
ಎಂದೆಂದಿಗು ನೀ ಕನ್ನಡವಾಗಿರು

ಎಲ್ಲಿದ್ದರೆ ಏನ್ ಎಂತಿದ್ದರೆ ಏನ್
ಎಲ್ಲಿದ್ದರೆ ಏನ್ ಎಂತಿದ್ದರೆ ಏನ್

ಎಂದೆಂದಿಗು ತಾನ್ ಕನ್ನಡವೇ ಸತ್ಯ ಕನ್ನಡವೇ ನಿತ್ಯ
ಅನ್ಯವೆನಲದೆ ಮಿಥ್ಯ

ALG - Application Level Gateway

An Application Layer Gateway (ALG) is a software component that is designed to manage specific protocols such as Session Initiation Protocol (SIP) or File Transfer Protocol (FTP)

The ALG intercepts and analyzes the specified traffic, allocates resources, and defines dynamic policies to permit the traffic to pass securely through the ALG.

Application level Gateway, as the name suggests, operates in the Application layer of the OSI model and actively inspects the contents of packets that are passed through to the gateway. Let's go ahead into the details of its functioning to understand this technology better.

The Application Level Gateway acts as a proxy for applications, performing all data exchanges with the remote system in their behalf. This can render a computer behind the firewall all but invisible to the remote system.

It can allow or disallow traffic according to very specific rules, for instance permitting some commands to a server but not others, limiting file access to certain types, varying rules according to authenticated users and so forth. This type of firewall may also perform very detailed logging of traffic and monitoring of events on the host system, and can often be instructed to sound alarms or notify an operator under defined conditions.

Application-level gateways are generally regarded as the most secure type of firewall. They certainly have the most sophisticated capabilities.

A disadvantage is that setup may be very complex, requiring detailed attention to the individual applications that use the gateway.

An application-level gateway acts as a intermediate system between the Internet and the application server that understands the relevant application protocol. This application-level gateway's system appears to the outside world as the end point application server, but in reality, the gateway interprets each incoming request, reduces the request to the application server's own internal lexicon, then builds a new request from scratch discards and prevents any malicious, malformed content from getting through. The gateway then sends a new request to the actual application server and processes the servers reply in the same fashion.

An application-level gateway intercepts the incoming and outgoing packets, runs a proxy to copy and forward information across the gateway, and functions as a proxy server, thereby preventing any direct connection between a trusted server or client and an untrusted host.

Functions of an ALG can be defined as:

Allow client applications to use dynamic TCP/ UDP ports to communicate with the known ports used by the server applications, even though a firewall configuration may allow only a limited number of known ports. In the absence of an ALG, either the ports would get blocked or the network administrator would need to explicitly open up a large number of ports in the firewall - rendering the network vulnerable to attacks on those ports.

Convert the network layer address information found inside an application payload between the addresses acceptable by the hosts on either side of the firewall/NAT.

Recognize application-specific commands and offering granular security controls over them

Synchronize between multiple streams/sessions of data between two hosts exchanging data.

Deep packet-inspection of all the packets over a given network

Two types of Proxies used by application-level gateways are:

Application-specific Proxies

Application-level Filtering

Application-specific Proxies. Application-specific proxies accept only packets that are generated by services they are designed to copy, forward, and filter. There is a drawback here that is if a network relies only on an application-level gateway, incoming and outgoing packets cannot access services for which there is not a proxy. For example, if an application-level gateway runs a Telnet proxy, only packets generated by this service could pass through the firewall. All other services would be blocked.

Application-level Filtering. An application-level gateway runs proxies that examines and filters individual packets. This is achieved by checking each packet that passes through the gateway, verifying the contents of the packet up through the application layer of the OSI model. These proxies can filter particular kinds of commands or information in the application protocols the proxies are designed to copy, forward, and filter.

TCP Explained.

Always on Time !!..The Transmission control protocol (TCP) Provides applications with reliable ,connection-oriented service and provides full logical path between two hosts on disparate networks .

This article is an attempt to detail the different fields available in the TCP segment .

Source and Destination port :Its a 16 bit field that specifies the source and destination applications for the encapsulated data.

RFC 1700 describes all the ports number in common and not so-common use (http://www.ietf.org/rfc/rfc1700.txt).

A port number for an application ,which is combined with an ip address of the applications where host resides in , is called a socket .
Sequence number : Its a 32 bit identifier which identifies where the encapsulated data is fits within a data stream .
If the sequence number of a segment is 1 and the segments contains 512 octets ..the next segment should have sequence number of 1+512=513.
Acknowledgment number :Its a 32 bit field which tells what would be the sequence number the source expects to receive from destination.
If a hosts receives a acknowledgment number that doesn't match the next sequence number it intends to send , it concludes that packets earlier sent has not reach the destination and it will re-transmits the same.

Header Length :Its a data offset and a four bit field indicates the length of the header in 32-bit words and indicates the beginning of the data.
Reserved Field :Its of six bites ..which are always set to zero.

Flags :They are six 1-bit flags that used for data flow and control .
URG -Urgent
ACK-Acknowledgment
PSH-Push
RST-Reset
SYN-Synchronize
FIN-Final

Window Size: 16 bit field used for flow control .It specifies the number of octets,starting with the octet in indicated by acknowledgment number, that the sender of the segment will accept from its peer.
It specifies how much data it can handle or process at a time .

Checksum: Its a 16 bit field covering both the header and the encapsulated data,allowing error detection.
Urgent pointer :Its again a 16 bit field ..its used only when the URG Flag is set..urgent pointer added to the sequence number indicating the end of the urgent data.

Options :Optional field .One good example is maximum segment size ..which indicates what will be the maximum segment size sender is willing to accept .

The remainder of the field is padded with zeroes to ensure that the header length is multiple of 32 octets .

Here below is an example of TCP packet capture details using Wireshark