20 Jan
2018
20 Jan
'18
3:14 p.m.
Jens Link lists@quux.de writes:
Is there any reason for blocking AWS IPv6?
I don't think that AWS is blocked but IPv6 prefixes > 32 are. I have the same problem with my mail server which is an /48 PI.
Your IP is announced by AWS in a /38:
# sh ipv6 route 2a05:d018:76d:5af6:d050:9b30:6bf7:df98 Routing entry for 2a05:d018:400::/38 Known via "bgp", distance 20, metric 0, best Last update 04w0d01h ago * fe80::e6aa:5dff:fe82:e001, via eth0
I don't think that is it. One of my mail servers is fine (in a /32 prefix), but the other one (in a /24 prefix) is not.
See https://dane.sys4.de/smtp/mork.no
Bjørn