Download Fortinet NSE 4 -FortiOS 7-2.NSE4_FGT-7.2.PremiumDumps.2023-12-18.66q.vcex

An antivirus profile in full scan mode buffers up to your specified file size limit. The default is 10 MB. That is large enough for most files, except video files. If your FortiGate model has more RAM, you may be able to increase this threshold. Without a limit, very large files could exhaust the scan memory. So, this threshold balances risk and performance. Is this tradeoff unique to FortiGate, or to a specific model? No. Regardless of vendor or model, you must make a choice. This is because of the difference between scans in theory, that have no limits, and scans on real-world devices, that have finite RAM. In order to detect 100% of malware regardless of file size, a firewall would need infinitely large RAM--something that no device has in the real world. Most viruses are very small. This table shows a typical tradeoff. You can see that with the default 10 MB threshold, only 0.01% of viruses pass through.

We have two logs, first with action deny and second with passthrough.  Remember ... action="passthrough" mean that authentication has occurred

Security Guide P167  Reference: https://kb.fortinet.com/kb/documentLink.do?externalID=FD37221 

TCP provides the ability for one end of a connection to terminate its output while still receiving data from the other end. This is called a half-close. FortiGate unit implements a specific timer before removing an entry in the firewall session table.

Security Guide P29  Reference: https://docs.fortinet.com/document/fortigate/6.4.0/hardening-your-fortigate/99buildingsecurity-into-fortios

Infrastructure Guide P196  Reference: https://pub.kb.fortinet.com/ksmcontent/Fortinet-Public/current/Fortigate_v4.0MR3/fortigatesslvpn-40-mr3.pdf

Infrastructure Guide P256, P276  Study Guide – IPsec VPN – IPsec configuration – Phase 1 Network.  When Dead Peer Detection (DPD) is enabled, DPD probes are sent to detect a failed tunnel and bring it down before its IPsec SAs expire. This failure detection mechanism is very useful when you have redundant paths to the same destination, and you want to failover to a backup connection when the primary connection fails to keep the connectivity between the sites up.  There are three DPD modes. On demand is the default mode.    Study Guide – IPsec VPN – Redundant VPNs.  Add one phase 1 configuration for each tunnel. DPD should be enabled on both ends.  Add at least one phase 2 definition for each phase 1.  Add one static route for each path. Use distance or priority to select primary routes over backup routes (routes for the primary VPN must have a lower distance or lower priority than the backup).  Alternatively, use dynamic routing.  Configure FW policies for each IPsec interface.  

Security Guide P279  Reference: https://docs.fortinet.com/document/fortigate/7.0.0/new-features/190873/video-filtering 

Infrastructure Guide P367, P168  configurable thresholds  Though it is recommended to keep the default memory threshold, a new CLI command has been added to allow administrators to adjust the thresholds.  Default values are : red : 88% of total memory is considered "used memory" extreme : 95% of total memory is considered "used memory" green : 82% of total memory is considered "used memory Reference: https://community.fortinet.com/t5/FortiGate/Technical-Tip-Conserve-mode-changes/tap/198502 

C - "Operating mode is per-VDOM setting. You can combine transparent mode VDOM's with NAT mode VDOMs on the same physical Fortigate.  D - "Inspection-mode selection has moved from VDOM to firewall policy, and the default inspectionmode is flow, so NGFW Mode can be changed from Profile-base (Default) to Policy-base directly in System > Settings from the VDOM" Page 125 of FortiGate_Infrastructure_6.4_Study_Guide