> Source: [sk183201](https://support.checkpoint.com/results/sk/sk183201)

# sk183201 - After an upgrade to R81.20 Jumbo Hotfix Accumulator Take 96 and higher, users with special characters in the username cannot login to Gaia Portal

| Property | Value |
|----------|-------|
| Solution ID | sk183201 |
| Date Created | 2025-03-04 |
| Last Modified | 2026-04-17 |
| Technical Level | Advanced |
| Products | Security Gateway, Security Management Server |
| Versions | R82.10, R82, R81.20, R82.10, R82, R81.20 |
| OS | Gaia |

## Symptoms

- * Login to the Gaia Portal fails with the error message "`Invalid username`".

* The same users can login over SSH as expected.

* Issue started after installing the R81.20 Jumbo Hotfix Accumulator Take 96 or higher.

## Cause

The R81.20 Jumbo Hotfix Accumulator Take 96 or higher contain the hardening change in the Gaia OS to prevent security issues (PMTR-103606).

Gaia Portal supports only these characters in the username (for local and for non-local users (RADIUS / TACACS)):

* Letters (a-z, A-Z)
* Digits (0-9)
* Dash (-)
* Underscore (_)

## Solution

This solution requires authentication. Please log in to view the full solution.

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