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KB44502 - Why IP Based Route Preference is Not Honored on Android with FQDN & IP Based Split Tunneling Policies?

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Last Modified Date6/19/2020 7:23 AM
Synopsis

Why IP Based Route Preference is Not Honored on Android with FQDN & IP Based Split Tunneling Policies?

By design, it is known behavior that Android OS and iOS will not support FQDN split tunneling and IP based split tunneling together. This is not a limitation of the OS but is a limitation of the feature design by itself.

As per the current design of this feature on an Android and iOS, if both FQDN split tunneling and IP based split tunneling policies are enabled, FQDN split tunneling will ignore the IP split tunneling policies and turn it off internally. 
 
Note: This limitation currently only affects Android OS. All other OS platforms except iOS (FQDN ST not supported).
Problem or Goal
The goal of this article is to understand why combined FQDN split tunneling and IP based split tunneling policies are not being honored on Android OS. 
Cause
This is an expected.behavior. Regardless of the specified split tunneling route preference configured under System > Configuration > VPN Tunneling > Precedence of FQDN / IP; if combined IPv4 and FQDN split tunneling policies are configured, the current behavior for Android is to ignore the IPv4 split tunneling and only honor the FQDN split tunneling.
Solution
Note: This limitation is in the engineering implementation pipeline for a feature enhancement release.
To work around this expected behavior on an Android OS, you need to convert any combined IPv4 and FQDN split tunneling policies to FQDN based only.  

ANDR-I-16 - Add support on split tunneling on Pulse Android Mobile when IPv4 and FQDN resource are defined simultaneously.
Related Links
Attachment 1 
Created ByDmitriy Melk-Karamov

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