How F-Secure firewall determines [mydns] definition in firewall rules? It happens to me that F-Secure Firewall denies connection to one of two DNS servers while I am using VPN. So I would like to know more what is laying behind [mydns] logic. Thanks!
Why 172.16.0.3? It doesn't make sense. I would rather expect that [mydns] is dynamically assigned by IP addresses of DNS servers according to actual TCP/IP configuration. But in that case, why f-secure fw denies name resolving to one of the DNS servers while I'm using VPN. I'm afraid there is a bug behind [mydns] logic.
Previously I have this FW rule for DNS:
localmachine -> [mydns] via TCP/UDP 53
To assure that both DNS servers are accessible for DNS resolving while I'm using VPN I have to replace the rule by this:
localmachine -> 0.0.0.0/0 via TCP/UDP 53
But I'm sill curious how [mydns] in F-Secure works.
Mazarin, you are right. I'm sorry for incorrect answer. [mydns] is dynamically changing list of DNS servers. The list is updating every time when FW checks the rule.
What product/version do you have?
If you think it doesn't work as expected, please, contact support. We will need more detailed information and probably debug logs from affected machine.