> Source: [sk182440](https://support.checkpoint.com/results/sk/sk182440)

# sk182440 - DNS name resolution does not work for SSL Network Extender users after upgrade

| Property | Value |
|----------|-------|
| Solution ID | sk182440 |
| Date Created | 2024-07-04 |
| Last Modified | 2025-02-12 |
| Technical Level | General |
| Products | Security Gateway |
| Versions | R81.20, R81.10 (EOS) |

## Symptoms

- DNS name resolution does not work for SSL Network Extender users after upgrading the Security Gateway to R81.20 Jumbo Hotfix Take 53 or higher or R81.10 Jumbo Hotfix Take 139 or higher.

## Cause

DNS name resolution depends on correctly configured DNS suffixes. After the Security Gateway upgrade, these DNS suffix settings are not applied to the Virtual Network Adapter when connecting to the SSL Network Extender. As a result, hostnames that need these DNS suffixes for resolution cannot resolve correctly.

## Solution

This problem was fixed. The fix is included starting from:

* [Check Point Quantum R82](https://support.checkpoint.com/results/sk/sk181127)

Check Point recommends to always upgrade to the most recent version   
([upgrade Security Gateway](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doShowproductpage&productTab=overview&product=435) / [upgrade Security Management Server](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doShowproductpage&productTab=overview&product=184) / [upgrade Multi-Domain Security Management](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doShowproductpage&productTab=overview&product=166)).

<br />

If you choose not to upgrade, Check Point can supply a **Hotfix** . [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 files](http://supportcontent.checkpoint.com/solutions?id=sk92739) from the Security Management Server and Security Gateways involved in the case.

**Hotfix installation instructions:**   
Refer to [sk168597 - How to install a Hotfix](https://support.checkpoint.com/results/sk/sk168597).

<br />

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