[Android app] Can't connect to a chromecast when wireguard is running

Samuel Holland samuel at sholland.org
Thu Jan 3 03:48:44 CET 2019

On 12/30/18 14:09, Samuel Holland wrote:
> Hi,
> On 12/30/18 13:10, Christophe-Marie Duquesne wrote:
>> Thinking about my former setup with Openvpn, I realized it had a setting 
>> "bypass VPN for local networks" (under "routing"). Is there such a thing
>> in the Wireguard app? (In the peer config, there is a checkbox "Exclude 
>> private IPs". In doubt, I tried to enable it, but then the wireguard 
>> interface stopped working with the message "Error bringing up tunnel: Bad 
>> address")
>> Generally, the app which I believe would solve my chromecast problem is 
>> probably "Google play services" (com.google.android.gms). It is 
>> unfortunately not part of the list of applications one can exclude from the
>> UI. Is there a way to do one of these two things? - Implement a feature
>> similar to "bypass VPN for local networks"
> That's the idea with the "Exclude private IPs" checkbox. Anything in the 
> RFC1918 range will not use the tunnel. Could you export a log (there's an 
> option in the app settings) with it failing, and send it to me (privately if 
> you want)?

The issue that was breaking the "Exclude private IPs" checkbox has been fixed
and will be part of the next release. Thanks for the report. (For the curious:
an IPv6 DNS server was getting added to the Allowed IPs list with an incorrect
netmask, and Android rejects VPN routes to subnets with a non-zero host part.)


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