[horde] Horde stops working if firewall blocks external domain

[Simon B]

On 13 Feb 2017 16:02, "Louis-Philippe Allard" <lp.allard.1 at gmail.com> wrote:
>
> 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?

Sounds like you, or an administrator added Google analytics scripts to your
Horde installation.

But as I remember you use Horde to interface to gmail's IMAP servers, so
that might also be an issue..

Simon