CGN fixed/hashed nat question
jfmezei_nanog at vaxination.ca
Wed Jan 23 21:31:47 UTC 2013
Question abbout CGN:
Generally speaking for CGN setups, how many end users are NATed to a
single public IP address ?
In terms of traceability, there is a huge difference between loading
200k end users onto 1 public IP and putting say 5 end users per public IP.
In the later case, it becomes possible to assign a good range of ports
to each of the 5 users on that IP address. In the former case, it isn't.
An ISP who nats 5 customers to each public IP address reduces fivefold
the need for pulic IP addresses, which is still a major accomplishement.
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