"is_vpns_attack_request Dropping invalid HTTP request, ...etc." logs displayed in /var/log/messages or /var/log/ns.log

These logs are added to alert the customer for potential attempts and you can check in upstream devices to ADC from where these requests are coming

---

Problem Cause

As a part of fix in the builds released for CVE-2019-19781,
the following warning messages have been added in /var/log/messages and /var/log/ns.log

is_vpns_attack_request: Found '/vpns/' in unwanted place
is_vpns_attack_request: Dropping invalid HTTP
requestis_path_traversal_or_vpns_attack_request: Dropping HTTP request with invalid Header/version
is_path_traversal_or_vpns_attack_request: Path traversal detected
is_path_traversal_or_vpns_attack_request: Found '/vpns/' in unwanted place
is_path_traversal_or_vpns_attack_request: Dropping invalid HTTP request