To avoid any connectivity issues to Zeplin from your network, make sure that all zeplin.io domains are whitelisted:

zeplin.io
app.zeplin.io
api.zeplin.io
img.zeplin.io
scene.zeplin.io
public.zeplin.io
ext.zeplin.io
pkg.zeplin.io
cdn.zeplin.io
mail.zeplin.io
zpl.io
zeplin.s3-accelerate.amazonaws.com
rink.hockeyapp.net
cdn.hockeyapp.net


In addition, for real time (socket) connectivity issues, also make sure that the HTTPS port is open. You can test these issues using the following diagnostic tools:

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