Global Protect attack

L4 Transporter

Global Protect attack


Someone could say me, what is the cause of the error?

Palo Alto: Monitor -> System

Receive Time: 08/09 9:22:58
Type: GlobalProtect
Severity: informational
Event: globalprotectportal-auth-fail
Object: Portal_Laptops
Description, GlobalProtect Portal user authentication failed. Login from 89.140.19x.2, User name: EERR, Reason: Authentication failed: Invalid username or password.
Receive Time: 08/09 9:22:53
Type: GlobalProtect
Severity: Informational
Event: Auth-fail
Description User 'CU4TREC4S4S \ EERR' failed authentication. Reason: Invalid username / password From 89.140.19x.2.


I wonder if it is an attack or not?

Is it an error about VPN client application?

Thank you,

L5 Sessionator

Re: Global Protect attack

These messages indicate GlobalProtect Portal Authentication failure. (SSL_VPN)

This particular event was triggered by Username"CU4TREC4S4S \ EERR" who entered Invalid Username or Password with reference to the Authentication Server (Radius/LDAP/Local).

L5 Sessionator

Re: Global Protect attack


why do you thing about an attack ? is it happen a lot, many time per minutes ?

Else, as explain Nadir, it's just a password error.

Are you using auto-login ? Are you using dynamic password ?


L5 Sessionator

Re: Global Protect attack

GP portal uses  Port 443 by default .For allowing uninterrupted access to GlobalProtect IP address, configured on Public Interface, port 443 needs to be allowed at all times.

If you see these messages more frequently from unknown/random usernames , you may consider blocking port 443  using security rule and changing the GP Portal port to a non-default port.

For detailed Instructions Refer :

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