I had a lot of problems with RB133 boards, When we buy them the ROS was 3.0.
After that there were ne versions, and I upgraded them to 3.1 , 3.2, 3.3 ... to 3.6,
After the last upgrade (to 3.6) My PPTP and PPPOE clients could not connect to internet. They connected to NAS (2.9.51)
but there was no TCP traffic, they have ping to all servers, but there was no HTTP, no ICQ.
Who can explain why?
After the downgrade to 3.5 then 3.4 ... , 3.1, and at last 2.9.51, they began to work.
Where did I make a mistake, or there was something wrong with the Routerboard