Is the use of a VPN connection against the rules?

[naoki914]

As the title says, if I use a vpn can my account be blocked/banned?

 

[duck that quacks]

§4) Accounts​

12. To be able to provide our service players may not mask account related information from the support team using technical means or by any other method. A player's rights in regards to privacy towards other users (like using an anonymous user name) are unaffected by this rule.

It goes against the rules, so you can obviously be banned