Unable to access local resources when connected using Mobile Connect on Android and Chromebook

06/26/2020 113 People found this article helpful 475,436 Views

Description

Mobile Connect application on Android and Chromebook are able to connect to the firewall running 6.5.4.6-79n, but cannot access the local resources present behind the firewall. Mobile Connect running on other platforms such as Windows or iOS is not affected by this. The NetExtender and bookmarks continue to work for the same firewall.

Cause

Compression Control Protocol (CCP) is disabled on the firewall with the latest firmware 6.5.4.6 and Mobile Connect on Android is always using CCP irrespective of it being disabled on the SSLVPN server on the firewall. The SSLVPN server actively rejects the CCP by sending "LCP Protocol-Reject", but the CCP reject is ignored by Android MC while clients on other platforms work well.

Resolution

This Issue has been investigated and reported on Issue ID: Gen6-1285.

The Mobile connect logs can be downloaded to verify this behavior. Use the KB: Collecting Mobile Connect Debug Logs On Android And IOS Devices for the same.

You will be able to see the following in the NxPluginLog.txt file.

Please contact SonicWall support to get the hotfix firmware 6.5.4.6-79n--HFGEN6-1285-3n that allows for an option on the firewall to Enable Compression Control Protocol(CCP) for SSL VPN connections.

There are two ways to contact technical support:

1. Online: Visit mysonicwall.com. Once logged in select Resources & Support | Support | Create Case.

2. By phone: please use our toll-free number at 1-888-793-2830. Please have your SonicWall serial number available to create a new support case.

If you do not have a mysonicwall.com account create one for free!

Once you have the HF firmware, please follow the firmware upgrade procedure as per the KB: How Can I Upgrade SonicOS Firmware? to apply the same on the firewall.

Once the HF firmware is applied

Navigate to MANAGE | SSL VPN | Server Settings.
Enable the option Enable Compression Control Protocol(CCP) for SSL VPN connections using the dropdown.
Click Accept .
A warning message will appear, click OK .

CAUTION: Making any changes on the SSLVPN server will reset any active connections.

Once this option is enabled, you should be able to connect and access local resources successfully with Mobile Connect from Android devices and Chromebooks.