DOCSIS - Data Over Cable Service Interface Specification
I have recently upgraded to a DOCSIS 3.0 Residential Gatway. I think that my previous cable modem was DOCSIS 2.0. It is not clear whether it is just the speed capabilities of DOCSIS 3.0 are the major reasons for the upgrade - trials with download speeds of 1.5 Gbit/s and upload of 150 Mbit/s based on DOCSIS3.0
The implementation of IPv6 is the area of interest for me and its implications for system security.
Quoting from the WikiP page:
DOCSIS 2.0 was released in December 2001. Most recently, the specification was revised to significantly increase transmissions speeds (this time both upstream and downstream) and introduce support for Internet Protocol version 6 (IPv6). This version, DOCSIS 3.0, was released in August 2006.
My concerns about the loss of anonymity
As the DOCSIS specification and implementation has the potential of much more precise addressing it would appear that the technology would allow individual devices to be connected to the Internet directly. The use of a router, as in the days of IPv4 will be less of a requirement.
The fact that Cisco name their current modem/routers "Residential Gateways", to me, is an indication of this. However, as we are still in a largely IPv4 world the "gateway" assigns local LAN addresses to individual devices connecting to the Internet through it. The way that I see this developing is that this eventually will not be the case and the gateway will connect your device directly to the Internet with no NAT (Network Address Translation)
I have recently upgraded to a DOCSIS 3.0 Residential Gatway. I think that my previous cable modem was DOCSIS 2.0. It is not clear whether it is just the speed capabilities of DOCSIS 3.0 are the major reasons for the upgrade - trials with download speeds of 1.5 Gbit/s and upload of 150 Mbit/s based on DOCSIS3.0
The implementation of IPv6 is the area of interest for me and its implications for system security.
Quoting from the WikiP page:
DOCSIS 2.0 was released in December 2001. Most recently, the specification was revised to significantly increase transmissions speeds (this time both upstream and downstream) and introduce support for Internet Protocol version 6 (IPv6). This version, DOCSIS 3.0, was released in August 2006.
My concerns about the loss of anonymity
As the DOCSIS specification and implementation has the potential of much more precise addressing it would appear that the technology would allow individual devices to be connected to the Internet directly. The use of a router, as in the days of IPv4 will be less of a requirement.
The fact that Cisco name their current modem/routers "Residential Gateways", to me, is an indication of this. However, as we are still in a largely IPv4 world the "gateway" assigns local LAN addresses to individual devices connecting to the Internet through it. The way that I see this developing is that this eventually will not be the case and the gateway will connect your device directly to the Internet with no NAT (Network Address Translation)
1 comment:
I was wondering what the advantages of this modem/gateway were - thanks for the information.
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