Andy asked:
It is not clear to me from reading your email what
your actual issue
is.
If there is some IP address that you are unable to reach from your
VPS(es), can you let us know what it is?
The other way around:- some IP addresses, ones used by AWS, aren't
always reaching my VPS.
The service that uses AWS is currently working for me, i.e. it is
reaching my VPS. It wasn't earlier this afternoon.
It's not easy to know which IP addresses aren't reaching it, but
54.224.171.85
50.16.139.168
just have. Neither are in /var/log/kern.log as being blocked earlier,
but it's not easy to know what IP address they were using then beyond
saying 'ones in the range assigned to amazonaws.com'.
Does that make sense?
Ian