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SSL VPN issue with DNS on Windows 10 - reloaded

Hi all,

I´m referencing to the closed thread here:

https://community.sophos.com/utm-firewall/f/vpn-site-to-site-and-remote-access/74757/ssl-vpn-issue-with-dns-on-windows-10

Said shortly, we´ve got exactly the same problem - and no resolution.

DNS resolution seems not to go over the ssl-vpn-connection.

I´ve already done the following to work around this issue:

- Use OpenVPN Client (Version 2.5.0-I601)
- Changed the Adapter-Order in the Registry (Tcpip\Linkage ...)
- Added the internal domain-name in the suffix list of the VPN-Network-Adapter in Windows
- Changed the DNS-Config on the UTM under Remote Access -> Advanced: Entered the Gateway IP-Address of the VPN-SSL Pool as the first DNS-Server and the domain name field contains the internal domain name.

Behaviour after the mentioned configuration:

nslookup serverxyz  -> Resolution works
nslookup serverxyz.domainname.local -> Resolution works
ping <ip-address of Server> -> Response OK
ping <netbios-name of Server> -> Response not ok
ping <fqdn of Server> -> Response not ok

Has anybody found a working solution for this issue?

Appreciate your help!



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