A security engineer received multiple reports of an IPSec VPN tunnel going down the night before. The engineer couldn't find any events related to VPN under system logs. What is the likely cause?
A.
Tunnel Inspection settings are misconfigured.
B.
The log quota for GTP and Tunnel needs to be adjusted.
This is a nasty question, and that's right. You don't need Tunnel Monitoring for generating logs on regard of Ipsec VPN on System Monitor. There might be no more quota in the firewall left .
of course logging automatically happen, that is why an alert message is received for vpn down, but the question is asking "reason for cause" in other words, what cause the vpn connectivity to go down?
IPSec tunnel events will be logged in the system log regardless. Tunnel monitoring itself will also generate system logs, but has a specific use-case and it's absence doesn't explain the missing tunnel logs.
It looks like Tunnel Monitor generates system logs = C
https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000CloXCAS
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