> Source: [sk174743](https://support.checkpoint.com/results/sk/sk174743)

# sk174743 - The setting "User is allowed only single login" is not enforced correctly

| Property | Value |
|----------|-------|
| Solution ID | sk174743 |
| Date Created | 2021-07-26 |
| Last Modified | 2023-11-13 |
| Technical Level | General |
| Products | Security Gateway |
| Versions | R81.20, R81.10 (EOS), R81 (EOS) |

## Symptoms

- * The user can connect simultaneously to the Security Gateway(Using Mobile Access Blade or an IPsec client), although the option "User is allowed only single login" is enabled.

* User accounts are stored in Active Directory Domain Services.

## Cause

The log-in to Check Point Gateway is not case-sensitive by default.

For example, a user with AD user - 'testuser' can connect with 'Testuser' and 'TESTUSER.'

## Solution

[Contact Check Point Support](https://www.checkpoint.com/support-services/contact-support/) to get a Hotfix for this issue.   
A Support Engineer will make sure the Hotfix is compatible with your environment before providing the Hotfix.   
For faster resolution and verification please collect [CPinfo](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk92739) files from the Security Management and Security Gateways involved in the case.

**Hotfix installation instructions:**   
Refer to [sk168597 - How to install a Hotfix](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk168597).

After the hotfix installation, follow these configuration instructions to enable or disable the case-sensitive SLP accordingly:

* To enable, run on Check Point Security Gateway:

  **`[Expert@HostName]# ckp_regedit -a SOFTWARE/CheckPoint/VPN1 incase_sensitive_slp -n 1`**

  Install policy
* To disable, run on Check Point Security Gateway:

  **`[Expert@HostName]# ckp_regedit -d SOFTWARE/CheckPoint/VPN1 incase_sensitive_slp`**

  OR

  **`[Expert@HostName]# ckp_regedit -a SOFTWARE/CheckPoint/VPN1 incase_sensitive_slp -n 0`**

  Install policy

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