Thank you for your help! That could be it!
I followed your instruction, with a boot-up reset and reinstall firmware, and delete the old image as well. Deleted the default ubnt user, create a new one with stronger password - I was pretty dumb to left it default all the time like those Asus router I used in the past. Changed the SSH port as well. If you have any recommendation to cleanse the router, please let me know 
Hopefully this will work. I will report in a few days. Thanks again!
↧
Re: ER-L PPPoE connection problem
↧