In addition to supporting built-in Portal authentication, firewall also supports custom Portal authentication, and does not require separate deployment of external Portal servers when using custom Portal authentication.

If internal employees access the Internet through a firewall and find that they cannot connect to the Internet normally, which viewing commands can be used on the firewall to troubleshoot the interface, security zone, security policy, and routing table? (Write any viewing command, require: command line Words must be complete and correct to score, and cannot be omitted or abbreviated)

Regarding L2TP VPN, which of the following is wrong?

aboutPKIOrdering of work processes, which of the following is correct?

Heartbeat message (He11o message): The two FWs send heartbeat messages to each other periodically (the default period is ( ) seconds) to check whether the peer device is alive. (fill in the blank)