[londons_explore]

ISP's could argue that websites should be logging source port numbers of tcp connections. That would allow them to have thousands of customers behind the same IP, and still able to identify a single one.

[josteink]

I find the amount of effort people still put into not learning IPv6 quite staggering.

This kinda stuff is clearly madness.

[zAy0LfpBZLC8mAC]

BTW, I just noticed: No, you cannot realistically have thousands of customers behind the same IP. There are only 65535 TCP ports per IP address, just loading your typical website that loads resources from tons of domains can easily need a hundred ports at once.

[londons_explore]

You only need 1 port for a connection per domain. You can reuse the same source port for different domains.

So only 65,535 customers can establish a connection to facebook.com from the same ip.

[zAy0LfpBZLC8mAC]

No, they couldn't, because that would be illegal. An ISP cannot just record the communication of their customers because it makes thing cheaper for them.

Also, that easily generates petabytes of logs, so it's not really cheap either.