FreeTDS problem connecting to SQL Server on Mac (Unexpected EOF from the server)

I think I got it, it's the TDS configured version, I had 5.0, which caused the error

Try running tsql -C to check what version are you using, and then you can invoke tsql overriding the version with:

TDSVER=7.0 tsql -H hostname -p port -U domain\\\username -P password

and it worked!

To make this permenant I found I need to edit the freetds.conf file and set it globally in there

vim /usr/local/freetds/etc/freetds.conf

tds version = 8.0

running tsql -C still showed that the version was 5.0 but connecting now worked every time.

TDS version need to match the correct tds protocol to connect to your db server, see below -

http://www.freetds.org/userguide/choosingtdsprotocol.htm

Choosing a TDS protocol version

***DB SERVER        |    TDS VERSION ***    
Microsoft SQL Server 6.x    = 4.2       
Sybase System 10 and above  = 5.0       
Sybase System SQL Anywhere  = 5.0     
Microsoft SQL Server 7.0    = 7.0       
Microsoft SQL Server 2000   = 7.1       
Microsoft SQL Server 2005   = 7.2   
Microsoft SQL Server 2008   = 7.2