Hello
I’ve got a problem with my configuration and can’t see the mistake.
We have 3 ssid for our Wlan. One of them is for our notebooks, so it is connected to our internal network. The other ones are networks with virtual interfaces (wlan0, wlan2).
In the internal network a windows server is responsible for DNS and DHCP. At the two other networks the utm is responsible for DNS and DHCP. DNS Forwarder are the two DNS Servers from the ISP, the same as for the internal DNS Server. So it shouldn’t be a difference.
There are firewall rules from the networks to Internet IPv4 for web surfing. No difference here also.
There are masquerading rules from the networks to the uplink interfaces. No difference.
Web filtering is enabled, we’re a public school. In allowed networks are the internal networks and the two Wi-Fi networks. So here also no difference.
Now here the Problem:
When connected to one of the guest networks, i.e. wlan0 I can browse the internet normally and can connect to the office365 portal. There I can open mails, calender,…. But when I try to open OneDrive for Business or Websites (both are located on a …sharepoint.com/… address) the site doesn’t open.
When connected to the internal network the sharepoint site works without a problem.
I'm not sure, if there are other sites with the same problem, I only found this one until now.
Because of the problem I updated manually from 9.309003 to 9.310009, but the problem stayed.
I tried to capture the network traffic with wireshark but I’m not really used to find the important things. One difference are the many black and red entries with retransmissions.
In the logs of the utm I couldn’t find anything what helped me. But maybe I just don’t see the wood for the trees.
Thanks for any help.
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