I'm doing a vpn client to microsoft but I have an ASA and I can not log the following error 'regular translation creation failed for protocol 47 src inside:192.168.x.x dst outside:155.229.204.x'
Microsoft clients use GRE (Protocol 47) to establish the tunnel. Assuming that your NAT rules are OK; the error that you are getting could be because you are missing pptp inspection.
In your inspection_default class you can add the command
inspect pptp
You can check into this link you need the full information:
