I all. Okay. I'm using an Airport Express to share my wireless modems Internet to all my apple devices. No problem. But, when setting my Airport Extreme as base, the only device working is my MacBook. On iPad I can only access safari. No apps, no email receiving (it does send after minutes waiting). I'm fed up with the extreme. In order for it to work on MacBook I had to take the MTU down to 1392 (survive provider suggestion). So, how do I do the same on iPad and iPhone. By the way, doesn't work at all on iPhone. I'm using a DNS address as provided by my service provider as well. Obviously a DHCP. Tried static ip. No luck.