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Exchange Server DNAT not available when connected to VPN

Pascal Groos

Hi,

We are facing some serious issues with 2 of our Exchange Servers which are behind an Sophos XG 210 FW18-379

We had 2 DNAT rules which allow HTTP and HTTPS to these servers these work fine from WAN side but a soon as we connect through VPN (IPSEC or SSL-VPN) these servers are not available

So instead of these DNAT rules we tried WAF rules to these 2 Exchange 2019 servers which bring a whole lot of different problems (disconnecting Outlook clients) but at least they are available through VPN.

i disabled one of the WAF rules and created a DNAT Rule through the new DNAT Wizard to one of these Exchange servers (port 80 and 443) which creates all the necessary rules (i believe?), after that i'm still not able to connect to the Exchange servers as soon as i make a VPN connection

Am i missing something?, it seems to me it would be rather simple to achieve this...



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