I have a uc540 with the newest firmware.
I have configured a wireless network with an own vlan. This wireless is only mobile devices like iphone and so on.
But if I try to open the app store or the webpage www.wdr.de it doesn't work. Pages like google.de or web.de works fine.
I have changed the wireless vlan to vlan 1 the default datavlan than i works.
The only different thing is that in the datavlan has an own windows dns server.
I also have configured on the uc an dhcp area for the wireless network for the dns server I out in the 184.108.40.206, 220.127.116.11 an I tried other open dns servers but nothing helps.
I thnak you in advance for youre help
Yes i am using it.
Is it Possible that the Firewall makes the Problem? It is in the Medium Level
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You need to have 'ip tcp mss-adjust 1452" on either Dialer or BVI interface.
Firewall is useless, you can disable it completely.