On Tue, May 12, 2015 at 2:50 PM, Jérôme Fleury <[email protected]> wrote: > I suspect Dropbox to hardcode their IP in their application. It's not > working at all on ipv6-only.
Heh, they are not hardcoding anything, they are just not consistent: 1) asking for AAAA for client.v.dropbox.com 15:10:32.233655 IP6 2001:67c:64:49:4c02:64ed:71e7:a16.62668 > nat64-ubuntu.ripemtg.ripe.net.domain: 54028+ AAAA? client.v.dropbox.com. (38) 15:10:32.234425 IP6 2001:67c:64:49:4c02:64ed:71e7:a16.58556 > nat64-ubuntu.ripemtg.ripe.net.domain: 28552+ AAAA? d.dropbox.com. (31) 15:10:32.270841 IP6 nat64-ubuntu.ripemtg.ripe.net.domain > 2001:67c:64:49:4c02:64ed:71e7:a16.58556: 28552 3/4/0 CNAME d.v.dropbox.com., AAAA 64:ff9b::6ca0:ace1, AAAA 64:ff9b::6ca0:acc1 (241) 15:10:32.279229 IP6 nat64-ubuntu.ripemtg.ripe.net.domain > 2001:67c:64:49:4c02:64ed:71e7:a16.62668: 54028 2/4/0 AAAA 64:ff9b::6ca0:accc, AAAA 64:ff9b::6ca0:acec (230) 2) but then asking for A only: 15:10:32.643915 IP6 2001:67c:64:49:4c02:64ed:71e7:a16.51052 > nat64-ubuntu.ripemtg.ripe.net.domain: 42675+ A? d.v.dropbox.com. (33) 15:10:32.647198 IP6 nat64-ubuntu.ripemtg.ripe.net.domain > 2001:67c:64:49:4c02:64ed:71e7:a16.51052: 42675 2/4/0 A 108.160.172.193, A 108.160.172.225 (201) 15:10:32.650615 ARP, Request who-has d.v.dropbox.com tell 169.254.64.90, length 28 -- SY, Jen Linkova aka Furry
