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by rendaw
529 days ago
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I used Jool! It worked great, but with some caveats. My ISP does DS-lite which is some abomination where the shared (split by port) IPv4 address is calculated based on the IPv6 address? Using a fixed mapping table? Which is both very popular here and has zero linux support. They had another option to do PPPoE IPv4 + SLAAC IPv6, but for this option they didn't support DHCP prefix delegation. So I had to use this, and to work around that I needed to make my IPv6 network bridged. The problem is Jool hooks into the linux routing table, and in the bridged network none of the outbound packets reach that table. So I had to 1. rewrite their RAs with my own DNS64 server and 2. mangle NAT64 packets to look as if they're sent to the router directly so they hit the routing table (and get processed by Jool): https://github.com/andrewbaxter/portalino/blob/main/source/o... Then I hit random MTU issues. MTU should be auto configured (and fixed when there's issues) but I saw problems with Chrome/Firefox refusing to load pages until I tried again at least 30s later until I forced the MTU lower. So close, but still so far. |
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