We are expecting to close port 139 on all physical routers/firewalls and have\nbeen told that Terminal Server Licensing may fail. We serve TS licenses from\none server to several other servers over a WAN. To avoid this we are\nattempting to implement IPSec between servers. With the servers tunneling\nthrough IPSec we are hoping to tunnel, port 139 requests past the physical\nrouters. The router would normally filter that out, and allow the 2003\nServer to accept request for port 139 (port 139 not blocked on the servers\nyet). Is this a workable solution? Also, if port 139 is blocked on the\nphysical server will that create later problems?