Java SE (Java Platform, Standard Edition)

Most of the time I work on VPN. When I am connected to VPN, and I start my application which starts H2, I get this error message. It works without any problem if I disconnect the VPN.

org.h2.jdbc.JdbcSQLException: IO Exception: "java.net.UnknownHostException: client.strong-ub2.reliablehosting.com: client.strong-ub2.reliablehosting.com: nodename nor servname provided, or not known" [90028-170]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:329)
at org.h2.message.DbException.get(DbException.java:158)
at org.h2.message.DbException.convert(DbException.java:273)
at org.h2.util.NetUtils.getLocalAddress(NetUtils.java:263)
at org.h2.server.TcpServer.getURL(TcpServer.java:193)
at org.h2.tools.Server.start(Server.java:459)

Thanks.