Mobile devices can only get to the internet with proxy server setting added
Hi, we're finding that some mobile devices can't connect to the internet through our wireless network without a proxy server being explicitly configured, whereas others can.
We have a Zone Director 1100 series in our second office. It’s firmware is as up to date as that model could be. We have a wireless network operating on it with three access points. All devices can connect via the access points without any problems.
The internet connection used by the Zone Director is in our Cambridge office. There is a Virgin Media IP/VPN link and a Virgin Media “National Ethernet” link connecting both offices, the IP/VPN being the main network connection between all of our offices.
The wireless network uses a specific subnet which we have routed down the National Ethernet link using routes configured on the switches at each office. IP addresses are assigned from a DHCP scope on a server in our main office. Our proxy server is in our main office as well.
We are finding that a Windows PC can connect to the wireless network and get internet access without a problem, without specific proxy details. However, if a mobile device tries the same thing, it cannot access the internet. We’ve found this on a Windows mobile, iPhone and iPad.If I explicitly set the proxy server on the mobile device, it accesses the internet. The DHCP scope does have a WPAD entry to assign proxy access but it doesn’t appear to be working. I am wondering if this is because DNS is routed down the other link (IP/VPN) that connects the offices.
I can’t ping or trace route to the DNS server from a mobile device.
Can anyone help?