the thing is this group is helpful mostly for accel-ppp related questions, like bugs, setup issues, performance tune ups or something related that is not obvious. I'm afraid it's not about general networking questions that can be easily searched with your preferred internet search engine, and doing so is more like not welcome here because attends community time with no anything in return. sorry
I want to spend up to $50, PayPal, and let others help me. The automatic configuration PPTP and L2TP that I purchased with others can only run in centos6 instead of centos7. I have a ready-made script and should soon be told by others to accel PPP It's also very simple, and it's faster. I'll give it a try, but it doesn't seem to be compatible with IOS system, and I used to buy one click scripts.