I've got SQL server running on a machine which is not in a domain, and which is not operating in mixed mode (it's running with "Windows Authentication").

I'm trying to connect to it from a Linux web server running freetds via TCP/IP, using NTLM to authenticate.

The firewall on the SQL server is very restrictive. 1433 is open to my web server, but I'm getting conflicting information from the web on what additional ports (TCP/UDP) are needed for NTLM to succeed. It is currently fail; I can talk on 1433 to request NTLM, but the actual authentication always fails.

One source says 137, 138, 139, but those are just the NetBIOS ports. Do I really need those? Another source says 135. Still others seem to say 1434... I can't make heads or tails of it. Dammit Jim, I'm a programmer, not a network administrator!

EDIT:

The exact error message:

Msg 18452, Level 14, State 1, Server , Line 0
Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.
Msg 20002, Level 9, State -1, Server OpenClient, Line -1
Adaptive Server connection failed

I am attempting to connect with a remote machine username, i.e. 'servername\username'. Some sources recommend that I set up mirrored accounts on the local and remote machines, but the local machine is running Linux, not IIS under Windows.