Guest WiFi Connects but does not have internet access

[Sbu]

Hi,

I have an issue with my guest wifi which is on a different v-lan 30. 

I can connect on the Guest V-LAN for just a few minutes, but only on one device, and then it drops.

After that, I can no longer get internet access. 

I am using the AP208 and on the WLC I have configured the DHCP Pool as follows:

Network ID :10.0.30.0

Gateway: 10.0.30.1 also allowed on my Sophos firewall 

DNS: 10.0.10.14

[Flavio Miranda]

Hi @Sbu 

   Clients devices have this odd behavior of test the internet connection when get into a wifi network and then drop off if they fail to access the internet.  This happens with android and apple and windows. 

 What you need to make sure if that your firewall is not blocking the clients when they are on the guest network.  I dont know this firewall but if it has a dashboard or a command line, try to monitor the logs while you connect your client to the guest network and ensure that the firewall is not blocking something. 

[Sbu]

Thank you I have noticed that the firewall is blocking the clients 

[Sbu]

The problem is with the DHCP.

If I select management network I get internet access however if I type in the correct V-LAN ID as shown below I don't get internet.