The current documentation at http://wiki.mikrotik.com/wiki/Manual:Interface/L2TP describes:
However, how I can select 40bit over 128bit using two RouterOS devices?MPPE 40bit RC4 and MPPE 128bit RC4 encryption are supported.
Please, don't say that 40bit it's a weak encryption, or recomened IPSec as MPPe 128bit is also insecure. That I need is a simple "ofuscation" with a very low CPU overhead. So, a 40bit encryption is a good alternative. Also, no encryption in L2TP plus IPSec is not a solution for me... I really need to use ONLY L2TP, but with 40bit and not 128bit encryption.
Someone knows how to stablish a L2TP connection (PPP in general) between two RouterOS devices using MPPE 40bit?
Please, help me!