[horde] Horde stops working if firewall blocks external domain

Michael J Rubinsky mrubinsk at horde.org
Mon Feb 20 16:02:16 UTC 2017

Quoting Louis-Philippe Allard <lp.allard.1 at gmail.com>:

> Quoting Simon B <simon.buongiorno at gmail.com>:
>>  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[1]" to a  
>>> block list (it is part of an automated blocklist feed from  
>>> iblocklist.com[2]).
>>> 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[1]"  
>>> 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[1]" 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
> Helli Simon,
> So if I added Google analytics scripts to my horde install, that was  
> automatically when installing Horde webmail, and I dont want that  
> stuff here...

This is not something that Horde adds. The only place in our entire  
source tree that 'google-analytics' appears is in a unit test for  
testing RSS feeds.

> How do I check that?

Use grep to search your horde and pear directory for 'google-analytics'.

> I wonder why would using horde to interface to Gmail's servers would  
> require google-analytics?
> Links:
> ------
> [1] http://ssl.google-analytics.com
> [2] http://iblocklist.com
>  Louis-Philippe Allard
> lp.allard.1 at gmail.com
> Sent using Horde Groupware on GNU/Linux
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