North American Network Operators Group
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Re: Security problem in PPPoE connection

  • From: Joe Maimon
  • Date: Sun Mar 12 14:41:43 2006 

Joe Shen wrote:
Hi,

We are facing problem with PPPoE in ethernet access
network.
To provide high speed access, 10Mbps/100Mbps ethernet
is used as access method. But, we found some guy
'steal' some other's account by listening to
broadcasting packets, and they also set up 'phishing'
PPPoE server to catch those PPPoE authentication
packets.
Well you need to do a few things

-- Terminate access to the miscreants
-- Implement features like private-vlans
-- Otherwise prevent ports from communicating between eachothers except through your authorized PPPoE server. MAC access lists may provide some help with that. You will need to examine exactly what your L2 switches support.