So, my SiXXS' POP seems to be in trouble and I was thinking in changing to HE. The idea is connect to HE, change radvd setup and... lots of other thinks:
UFW, specially in laptops, which only allows access to some development services from some RFC1918 addresses and to my global IPV6 addresses
My servers have fixed IPv6 addresses to easily DNS setup
Some software needs some type of reference to the "local" addresses in setup (like squid acls or libvirt networks)
So my question is: what is the best way to deal with this?, let's suppose that tomorrow I need to change my tunnel broker, or for whatever reason I need to change my prefix and use another provider as a backup, do I really need to review all my setup? The only solution I can think of is ULAs and NAT which I dislike (or ULAs plus global addresses but I think this setup is not recommended)
(A possible solution if I understand correctly would be Mobile IPv6, but is this really an option today?, how many providers work with it?)
Summarizing: what options do I have to simplify the administrative task of changing IPv6 prefix of a network?
Thank you very much for your answers but I think that I have left some things unexplained that are important for this question: https://en.wikipedia.org/wiki/IPv6_address#Default_address_selection gives a table of the selection preference in case you have more than one address. As both SiXXS and HE use 2001:: prefixes, this means that (if I read the table correctly) the global addresses will always be selected and never the ULAs. So if I setup squid to limit access based on ULAs, it will not work because all clients will identify themselves with the global address. There's another question about the same issue but the answer, using both ULAs and global addresses works because the public prefix is 2000:: in this case.
I am right?, or I'm wrong about address preference?