Correctly, internally it is attainable.
My Provider has nothing in between, also the rout which I use gives everything to the NS further.
There, however, the firewall blocks everything.
A host I can not create firewall because this is in the DNS with entry is provided.
"Host Identität wird schon benutzt" (Host identity is already in use)
In which files should this forwarding be deposited?
Property times yesterday times in the directory etc / shorewall looked but these are all empty or have only the standard entries ....