I should be able to get a 3G dongle going with my firebrick now. I forgot stupidly to order a SIM for it, well in fact the entire issue never occurred to me, never gave it any thought at all. If I had thought about it in the slightest, I could have asked “does the dongle come with a SIM then?”
The SIM is here now anyway. I do not know what ID [?] is associated with it - there are various contenders lurking in clueless.aa.net.uk so I need to sort that out somehow.
1. I need to write some XML config for the Firebrick - don't know where to start. This means groping round in the website. Could anyone get me started?
2. I want to get an IPv6 proto 41 (6in4 ?) tunnel going so that my IPv6 range continues to work after failover to the dongle. I am not sure what I am doing with that, and AA support are working it out for me. Any help?
[Failover will not be much use if everything that is currently using IPv6 at the time dsl goes down - and that is a lot of web stuff now, all google, all facebook for example - simply fails and new connections have to be made somehow over IPv4.]
3. I will need to think about MTU; when the IPv6 failover happens we go to a tunnel and that means reduced MTU. One can only hope that path MTU discovery gets done again. But when does it get redone? And why - what should trigger that? The TCP MSS could get set to something more suitable, but when and how?
