What is DoS attack? How can it be prevented?

DoS (Denial of Service) attack can be generated by sending a flood of data or requests to a target system resulting in a consume/crash of the target system’s resources. The attacker often uses ip spoofing to conceal his identity when launching a DoS attack.

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Checkpoint firewall common commands part 2

Checkpoint firewall common commands part 2 For basic firewall informaton gathering: fgate stat -Status and statistics of Flood-Gate-1. fwaccel <stat|stats|conns> – View status, statistics or connection table of SecureXL. fw getifs -Show list of configured interfaces with IP and netmask. cpstat <app_flag> [-f flavour] -View OS, HW and CP application status. Issue cpstat without any options to see all possible application flags <app_flag> and corresponding flavours. Examples: cpstat fw -f policy – verbose policy info cpstat os -f cpu – CPU utilization statistics cpinfo -y all -List all installed patches and hotfixes. cpd_sched_config print -Show task scheduled with CPD scheduler. enabled_blades -View enabled software blades avsu_client [-app <app>] , get_version <app> -Get signature version and status of content security .Without the -app option “Anti Virus” is used. show co...

Unable to Connect to Server Checkpoint R80

Unable to Connect to Server Checkpoint R80 Unable to Connect to Server A connection to the management server will fail if: A firewall between SmartConsole and the management server blocks Port 19009 - port 19009 is used for a new R80 service. Allow traffic on this port for all clients and management servers. No GUI clients are assigned - Open the Gaia Portal. If the First Time Configuration Wizard opens, complete it. If the First Time Configuration Wizard has already run, open User Management > GUI Clients and add a client. When using Multi-Domain Security Management, connect SmartConsole to the Multi-Domain Server and make sure the domains have GUI clients assigned to them. The required processes are not reachable - Make sure the computer with SmartConsole installed can reach the IP address of the management server, and that these server processes are up and running: cpm fwm Operation time out – Your connection ...

Configuring Proxy ARP for Manual NAT

Configuring Proxy ARP for Manual NAT Symptoms After creating a Manual Static NAT rule, Security Gateway does not answer the ARP Requests for the Static NATed IP address that was configured in the Manual NAT rule. Security Gateway replies to ARP requests with a wrong MAC address, mostly for the NAT traffic. Introduction Let us consider the following scenario: Two networks ( Network_A and Network_B ) are separated by a Security Gateway (single Security Gateway or ClusterXL). On each network, there is a host ( Host_A on Network_A , Host_B on Network_B ). Let us assume, that Network_A represents the Internal network, and Network_B represents the External network. According to the existing standards, when Host_B needs to send data to Host_A , an ARP Request for the MAC address of Host_A will be sent by Host_B to Network...

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