Remote Command Execution FROM a Mikrotik

I have setup a blackhole BGP route server and from any Unix, I am able to use Fail2Ban and send remote commands to add the failed attempts to the blackhole list. For the life of me, I cannot figure how to do the same thing from a Mikrotik.

I really don’t want to use another Unix box to log into each firewall to get the banned_ip list from each router, but I think that will be the only way to do it unless Mikrotik has a remote command execution that I am totally missing.

What about fetch ? http://wiki.mikrotik.com/wiki/Manual:Tools/Fetch
You can upload script updating address lists on MT firewall and periodically run that script.
See this: http://wiki.mikrotik.com/wiki/Using_Fetch_and_Scripting_to_add_IP_Address_Lists