How Does Firewall Work?

Replies

• 

  Reya

  Re: how does firewall works??
  
  Have a look at this site
  
  #-Link-Snipped-#
• 

  Kaustubh Katdare

  Firewalls are designed to secure individual computers or networks from external unauthorized access. I'm assuming that your servers/network is at a remote location; the client must have configured a hardware or software firewall to protect it. Those with a password will be granted limited access.
  
  That essentially means the firewalls will have to continuously monitor the incoming and outgoing traffic through them. As mentioned in the HSW article, there are various techniques used by firewalls to monitor the traffic. It includes Packet Filtering, Proxy or Per-State verification. The network administrator can turn on/off various services and security levels for entire network or selected nodes in the network.
  
  There's an old thread on CE that might help you understand the concept of Firewall better. Look here: #-Link-Snipped-#
• 

  kunaljd

  consider i wrote down all the passcode this device can generate.
  designed one javascript which will generate only those numbers. then i can breach firewall from anywhere??
  is it possible???
• 

  Kaustubh Katdare

  kunaljd

  consider i wrote down all the passcode this device can generate.
  designed one javascript which will generate only those numbers. then i can breach firewall from anywhere??
  is it possible???

  I'm not sure Javascript would be an ideal solution. Also breaking a firewall isn't very easy. If the firewall admin hasn't implemented strong security rules, the servers and networks can be compromised. I'm not sure whether the network and the firewall is exposed to the Internet, if not, you'll have to break into the network that has access to the firewall.
  
  As far as I know, brute force is not allowed. Modern firewalls are also capable of handling DDOS attacks. 😀 . However I strongly recommend that you shouldn't do it, unless you have permission from the network admins.
• 

  kunaljd

  No. actually we have access to main website and passcodes are ramdomly generated numbers in device.
  and if i get access to server,i can modify it with simple javascript. which is so simple that noone can find it.
• 

  jerichos

  this is something i wanna learn, IT engineering
• 

  4M4N

  Firewall protection works by blocking certain types of traffic between a source and a destination.
  For more info please refer: #-Link-Snipped-#
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  narayana murthy

  is hacking software doesnt works in firewall???
• 

  Kaustubh Katdare

  narayana murthy

  is hacking software doesnt works in firewall???

  What exactly is a hacking software?
• 

  narayana murthy

  i mean the software which uses to hack websites
• 

  kunaljd

  There are no hacking softwares.
  Actually a hacker plants a virus or malware on the website which crashes the website.
  There are various methods to do that.
  
  
  @the_big_k: If a dropdown in html contains all the passcode and i write shell script to put any option of this dropdown particula textarea of website when it appears on browser. Will it work ??