On Monday, February 12, 2018 at 8:58:17 PM UTC+1, donoban wrote:
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> On 02/12/2018 06:39 PM, Demi Obenour wrote:
> > What websites and ports do I need to whitelist if I want to enable
> > use Thunderbird with GMail and Google Calendar?  I am using the
> > Google Calendar add-on.
> 
> Since Google uses a lot of different ip's it's pretty hard to maintain
> an ip based firewall for access their services. You can try with ping
> and digg commands for get some ip's of their domains but them will
> likely change in few time.
> 
> 
> I think that you can achieve it using http filtering [1] but I've
> never tried.
> 
> [1] https://www.qubes-os.org/doc/config/http-filtering-proxy/
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Isn't it possible to use DNS on those multiple of IP's from google? or are they 
changing DNS's too like they change IP's? That would be such a headache if they 
do though... Also, DNS can be stolen through hacking DNS services (but not 
spoofed right?), so I guess it may be a security risk not to use IP's over DNS? 
But Google should have some pretty tight security on their DNS's? Like not just 
a password, but second factor authentication etc. too. I'm merely thinking out 
aloud here, any chance anyone can put this straight with facts? As such, it 
might help the OP if a DNS approach works.

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