[horde] Horde stops working if firewall blocks external domain

[Vilius Sumskas/LNK]

Hi,

"horde" <horde-bounces at lists.horde.org> wrote on 2017.02.13 17:02:43:

> Hello list,
> 
> I have a Horde Webmail 5.2.17 up to date running on a Centos 7 VPS.  
> MySQL database is hosted on another VPS ont he same LAN.  
> Communication between VPS'es is 100% functional without any issues.
> 
> Once in a while I login to Horde which uses IMP as my auth 
> application. IMP uses my Gmail account to authenticate me to Horde.  
> All has been working well until I made some changes to my firewall and 
> added the domain "ssl.google-analytics.com" to a block list (it is 
> part of an automated blocklist feed from iblocklist.com).
> 
> What happens is that I am working in Horde (calendar, emails, tasks, 
> etc) then all of a sudden, connectivity stops, the apps are not 
> responding, and I see the red popup at the bottom corner of the screen 
> saying "Error communicating with server".
> 
> I have successfully connected this type of incident with the firewall 
> logs and indeed it is when "ssl.google-analytics.com" is blocked.
> 
> My question is: why is horde insisting to connect to an outside domain 
> (google's in this case) when it is not necessary?  All data is stored 
> in a local LAN database, and the VPS is also on LAN.  Actually, I 
> would expect only IMP and the emails to cease working if it 
> ***really*** needs to use "ssl.google-analytics.com" to function...
> 
> That looks sketchy to me...
> 
> Anybody can shed some light on this?

Do you experience the same issue if you use any other browser which is not 
Chrome?

-- 
   Vilius