aaaz

How stateful firewall create entry for udp connection in its state table ?and what is the difference between connection table and state table?

author
TARUN ARORA
,
ZAP
  • Total 1 Answer
  • 6851
Can You answer this question?
author
Ajaypal Bajwa

now let me talk about tcp first tcp is a connection oriented protocol which forms the connection  then transmit data and after transmission tear down the connection so firewall understand when we initiate the tcp connection through it that it is a connection initiation request and add the entry in the connection table. when the connection is terminated device sends fin msg and firewall understands thats its a connection termination message so removes the entry from the connection table

now in case of udp no connection formation no connection termination direct transmission so when we send udp traffic through the firewall from higher sec level to lower it simply adds the entry in the connection table as there is no connection termination in case of udp so firewall doesnt know when to remove the entry from the connection table so firewall relies on idle timer of the connection for udp it is 2mins by default

Recommended

Whoops, looks like something went wrong.

1/1 ErrorException in Filesystem.php line 111: file_put_contents(/var/www/html/storage/framework/sessions/xUk90ekTKelqoPEPhYU63OKXNITJhf77puvackkq): failed to open stream: No space left on device

  1. in Filesystem.php line 111
  2. at HandleExceptions->handleError(2, 'file_put_contents(/var/www/html/storage/framework/sessions/xUk90ekTKelqoPEPhYU63OKXNITJhf77puvackkq): failed to open stream: No space left on device', '/var/www/html/vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php', 111, array('path' => '/var/www/html/storage/framework/sessions/xUk90ekTKelqoPEPhYU63OKXNITJhf77puvackkq', 'contents' => 'a:4:{s:6:"_token";s:40:"lSKvAZ4KBc9qKrlZmYc9jtJJxJ6s3VULyIaqJYkD";s:11:"viewed_urls";a:1:{i:0;s:140:"how-stateful-firewall-create-entry-for-udp-connection-in-its-state-table-and-what-is-the-difference-between-connection-table-and-state-table";}s:9:"_previous";a:1:{s:3:"url";s:168:"http://www.networkbulls.com/how-stateful-firewall-create-entry-for-udp-connection-in-its-state-table-and-what-is-the-difference-between-connection-table-and-state-table";}s:6:"_flash";a:2:{s:3:"old";a:0:{}s:3:"new";a:0:{}}}', 'lock' => true))
  3. at file_put_contents('/var/www/html/storage/framework/sessions/xUk90ekTKelqoPEPhYU63OKXNITJhf77puvackkq', 'a:4:{s:6:"_token";s:40:"lSKvAZ4KBc9qKrlZmYc9jtJJxJ6s3VULyIaqJYkD";s:11:"viewed_urls";a:1:{i:0;s:140:"how-stateful-firewall-create-entry-for-udp-connection-in-its-state-table-and-what-is-the-difference-between-connection-table-and-state-table";}s:9:"_previous";a:1:{s:3:"url";s:168:"http://www.networkbulls.com/how-stateful-firewall-create-entry-for-udp-connection-in-its-state-table-and-what-is-the-difference-between-connection-table-and-state-table";}s:6:"_flash";a:2:{s:3:"old";a:0:{}s:3:"new";a:0:{}}}', 2) in Filesystem.php line 111
  4. at Filesystem->put('/var/www/html/storage/framework/sessions/xUk90ekTKelqoPEPhYU63OKXNITJhf77puvackkq', 'a:4:{s:6:"_token";s:40:"lSKvAZ4KBc9qKrlZmYc9jtJJxJ6s3VULyIaqJYkD";s:11:"viewed_urls";a:1:{i:0;s:140:"how-stateful-firewall-create-entry-for-udp-connection-in-its-state-table-and-what-is-the-difference-between-connection-table-and-state-table";}s:9:"_previous";a:1:{s:3:"url";s:168:"http://www.networkbulls.com/how-stateful-firewall-create-entry-for-udp-connection-in-its-state-table-and-what-is-the-difference-between-connection-table-and-state-table";}s:6:"_flash";a:2:{s:3:"old";a:0:{}s:3:"new";a:0:{}}}', true) in FileSessionHandler.php line 83
  5. at FileSessionHandler->write('xUk90ekTKelqoPEPhYU63OKXNITJhf77puvackkq', 'a:4:{s:6:"_token";s:40:"lSKvAZ4KBc9qKrlZmYc9jtJJxJ6s3VULyIaqJYkD";s:11:"viewed_urls";a:1:{i:0;s:140:"how-stateful-firewall-create-entry-for-udp-connection-in-its-state-table-and-what-is-the-difference-between-connection-table-and-state-table";}s:9:"_previous";a:1:{s:3:"url";s:168:"http://www.networkbulls.com/how-stateful-firewall-create-entry-for-udp-connection-in-its-state-table-and-what-is-the-difference-between-connection-table-and-state-table";}s:6:"_flash";a:2:{s:3:"old";a:0:{}s:3:"new";a:0:{}}}') in Store.php line 128
  6. at Store->save() in StartSession.php line 88
  7. at StartSession->terminate(object(Request), object(Response)) in Kernel.php line 216
  8. at Kernel->terminateMiddleware(object(Request), object(Response)) in Kernel.php line 187
  9. at Kernel->terminate(object(Request), object(Response)) in index.php line 58
  10. at require_once('/var/www/html/public/index.php') in index.php line 20