Hi everybody.

I have some small network as described here:

http://forum.mikrotik.com/viewtopic.php ... 40#p498740

It works almost fine except one thing. Internet connection is really poor. People with Android phones complaining that cannot connect to Google Play, Viber is working/not working and Skype also. Gmail is not synced and so on... Other things works fine (other apps or browsers). Firewall is no issue because it is same behavior with firewall or without. I tried to lower MTU settings but still the same thing.

Any Ideas?

Found problem. Needed to set correct MTU value on my router.