Hey Ryan I think I've found the problem. Our app was making two calls to get a request token in very quick succession which resulted in the same nonce. I think this explains the 401, so not an IP problem at all. Sorry if I wasted your time.
On Nov 26, 10:16 am, timwhitlock <tim.whitl...@publicreative.com> wrote: > Thanks Ryan. > The IP that results in failures is 87.224.88.186 > I've run the exact same code on three other servers and the response > is fine. > > We recently mucked about with some DNS settings, so perhaps you run > some kind of reverse lookup, and something looks suspicious? > Let me know if there's anything I can sort out there. The IP is > static, but it's not a hosting provider. This is our office > development server's public facing address. > > Tim.