NSE7Demo

The kernel-drop counter counts packets that matched the sniffer filter but were not captured or displayed by the sniffer, such as when capture buffering cannot keep up. It does not indicate that FortiGate dropped those packets while forwarding traffic.

FortiGate selects the most specific route first; when routes have the same prefix length, it installs the route with the lower administrative distance. The port2 default route has distance 20, whereas the port1 default route has distance 10, so only the port1 route is installed in the routing table. The routing database can still show the unselected port2 route.

With a regular LDAP bind, the username must be an account identifier with sufficient LDAP access, such as a domain-qualified username, UPN, or the account’s full distinguished name. dc=trainingAD,dc=training,dc=lab identifies only the domain, not a bind user. The returned distinguished name identifies the Administrator account as cn=Administrator,cn=Users,dc=trainingAD,dc=training,dc=lab; meanwhile, the configured search base correctly identifies its parent Users container. Fortinet documents the supported regular-bind username formats and the purpose of the distinguished-name search base.

FSSO records the workstation name from the logon event and resolves that name to an IP address for the user-to-IP mapping. An incorrect IP associated with a known workstation name indicates that the workstation’s forward DNS name resolution should be verified.

FortiGate processes remote RADIUS authentication through the non-blocking authentication daemon, fnbamd. Enabling diagnose debug application fnbamd -1 produces detailed real-time authentication diagnostics, including RADIUS exchanges and failures.

FortiGuard category group g07 is Internet - Business, and the category listing includes 49 Business; therefore the website is classified as Business.

The SIP session helper is kernel-based, while SIP ALG operates as a proxy/user-space service. SIP ALG supports SIP high-availability session failover and can process SIP over IPv6; these are capabilities not provided by the legacy SIP session helper. Both support SIP over TCP and UDP, and the session helper can dynamically establish RTP/RTCP media pinholes or expected sessions based on SIP signaling.

For routes to the same destination, FortiGate selects the route with the lower administrative distance for installation in the routing table. The port2 default route has a distance of 20, whereas the port1 default route has a distance of 10, so only the port1 route is installed and displayed in the routing table.

Application-layer test commands can provide statistics and configuration information for a feature or process, and certain commands can restart an application. Real-time application debugging and filtering of real-time debug output are handled by debug commands rather than application-layer test commands.

SSL certificate inspection examines TLS handshake and certificate information rather than decrypting HTTPS content. Without SNI, FortiGate uses the server certificate identity—the Issued To (Common Name) field—to determine the hostname for web filtering.

The two default routes have the same destination and equal cost values, so FortiGate applies Equal-Cost Multi-Path (ECMP) routing and load-balances Internet-bound traffic across the gateways on port1 and port2. The route on port3 applies only to the directly connected 10.0.1.0/24 network.

ephemeral=0/65536 indicates that zero ephemeral sessions are present, and memory_tension_drop=0 indicates that no sessions have been dropped because of memory tension. The TCP-state entries account for only 172 sessions, not the total 591 session-table entries; additionally, SYN_SENT, rather than NONE, represents a TCP connection awaiting completion of the three-way handshake.

An F status flag means the FortiGuard rating server has failed to respond and is periodically retried; the failed server is probed every 15 minutes. A D flag means the address was discovered through DNS, while I identifies the server used for the initial contract-validation request. The initial server address is 209.222.147.36, not 209.222.147.3. A negative TZ value identifies the server time zone and does not indicate a service outage.

A static route requires an operational outgoing interface and a valid next-hop address on a subnet reachable through that interface. If link-health monitoring is configured for the route, the monitored link must also be up for the route to remain active. A route with a higher administrative distance is less preferred, so it does not disqualify the static route.

OSPF neighbors on the same network require interface addresses in the same subnet and matching hello and dead intervals. They also require matching OSPF interface MTUs for normal database-description exchange; otherwise the adjacency cannot fully form unless MTU checking is configured to be ignored. Router IDs must be unique, and interface costs may differ.

IKE Phase 1 succeeds only when both peers have a mutually supported proposal. The remote peer offers 3DES-CBC with SHA2-256 and MODP1536, whereas the local peer offers AES-CBC-128 with SHA2-512. Configuring 3DES encryption and SHA256 authentication on the local gateway creates a matching Phase 1 proposal.

Ephemeral sessions are incomplete or one-way flows rather than established bidirectional communications. This includes TCP traffic that has not completed its three-way handshake and UDP traffic for which the firewall has seen only a single packet in one direction. TCP teardown states and bidirectional UDP flows are not ephemeral.

Shorter session lifetimes remove inactive session entries sooner, reducing session-table memory consumption. A lower maximum file-inspection size reduces the memory required to process and buffer inspected content. Longer TCP session timers retain session state longer, while a longer FortiGuard cache TTL retains more cache entries.

IPS adaptive scanning evaluates session traffic characteristics to determine when sufficient inspection has been performed and the traffic can be safely removed from IPS scanning/offloaded. With intelligent mode disabled, IPS scans every byte of the session.

The IKE log filter uses src-addr4 10.0.10.1, although 10.0.10.1 is the remote gateway. IKE traffic sent to that peer has 10.0.10.1 as its destination, so the relevant debug traffic does not match the source-address filter. Fortinet documents distinct source- and destination-address IKE log filters; filtering this peer as the destination requires dst-addr4 10.0.10.1.

Protocol number 1 is ICMP. The original-direction SNAT entry shows the original flow as 10.1.10.10 to 10.200.5.1; 10.200.1.254 is the translated source address. Fortinet documents that ICMP sessions use proto=1 and show proto_state=00, while TCP uses protocol number 6.

The Collector Agent discards logon events for accounts in its ignore-user list, so an ignored account is not sent to FortiGate as an active FSSO user. FortiGate uses the AD groups associated with identity-based firewall policies to authorize FSSO traffic; at least one of the user's groups must be permitted by a firewall policy for Internet access. Fortinet FSSO documentation explains that FSSO supplies user and group information and that access is allowed when a user belongs to a group permitted by the selected security policy.

NAT overload translation requires an available source port from the configured NAT address pool. When the available NAT ports are exhausted, FortiGate cannot allocate a NAT port for a new connection. Fortinet documents that overload NAT makes a finite set of ports available per translated IP address and logs a resource-related event when no translation resource can be assigned.

The TCP half-open timer controls how long FortiGate retains a session after one peer sends an open-session packet and before the other peer responds. Increasing it allows the SYN/ACK to arrive and complete the TCP handshake instead of encountering a deleted session.