There were two things preventing me from connecting:
– I did not have the correct port. Found this using: tsql -LH IPAddress
– Then I was stuck. Finally found the post below. You have to have a freetds config file in the home directory. Somthing like this:
awesomeserver:~$ less .freetds.conf
[global]
# TDS protocol version
tds version = 7.0