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by colejohnson66
1987 days ago
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Me too. I’ve always wondered how a NAT knows where to route traffic. I figured it would use a lookup table, but I never know what the “keys” were. For some reason, using different ports for each device behind the NAT never crossed my mind! I knew it couldn’t be done by adding routing data to the packets (which is what IPv6 ended up doing) because that isn’t sustainable over multiple NATs. A port based routing with a table makes so much sense! It also explains why idle sessions are dropped. |
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