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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Security control in DSL access network
On Tue, 28 Mar 2006, Peter Dambier wrote: > I cannot tell you wether this is a DSLAM or a BRX but I guess it is both > in a single one box. Not unless Germany is a very, very small country. The Holy See and Monaco might be small enough to serve the entire country from a DSLAM. DSL is distance sensitive. If your country is bigger than about 5 km, you have lots of DSLAMs. You are confusing a BRAS (Broadband Remote Access Server) with a DSLAM (DSL access multiplexer). The DSL access network does not show up in an IP traceroute. As I suggested before, please read the technical reports available from the DSL forum <http://www.dslforum.org/>. A misleading diagram, but for the purpose of reference, a typical user connection: ROUTER---ip---BRAS---atm---DSLAM---dsl---B-NT---ethernet---COMPUTER In reality, these are protocol stacks such as IP over PPP over ATM over DSL, but it makes the ASCII artwork very confusing. Understanding the security issues involved with just one of components in the diagram is a challenge. Finding people who understand the security issues involved with ALL of the components in the diagram is a huge challenge. Usually you rely on people responsible for each of the components are doing a good job at keeping their part of the picture secure and working.
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