> my server (fiume) and my client (stremen) both have a firewall and the
> client fails to be backed up (the server goes fine).  amcheck reports
> no problem.  On the client, I have opened TCP/UDP port 10080, and TCP
> ports 10082 and 10083, because I seem to have seen something like that
> when googling.
> 
> I have also seen that apparently the data connection between server and
> client at the time of the actual backup uses a variety of ports, or are
> looking for free ports, but I do not understand really all this.  Below
> are the relevant error messages:

They do.

If you are using iptable/ipchain (whatever the most recent) there is a
module for amanda that you could use.

Else you may reconfigure your server to use only a certain port range
and open these in your firewall.

Olivier