[horde] Disable gethostbyaddr() - Reverse Lookup Problem

Jan Schneider jan at horde.org
Wed Oct 26 08:20:05 UTC 2016

Zitat von Andre Luiz Paiz <andre.paiz at iqm.unicamp.br>:

> Dear Horde team,
> We are experiencing problems with reverse DNS lookup from some  
> users. When DNS cannot reverse the user IP address from some  
> external providers, the webmail becomes very very very slow.
> I have disabled all apache reverse lookups, but I have seen  
> somewhere that horde makes use of the gethostbyaddr() PHP function.  
> If that so, is there a way to avoid using it?
> I know that this is not a Horde problem, but we have a provider here  
> in Brazil that is causing this problem to a lot of users and I need  
> a work around.

Try installing Net_DNS2.

Jan Schneider
The Horde Project

More information about the horde mailing list