Proxy issue - Failing proxied request for user error

[James Wood]

There is no firewall on the box itself (all UDP to 1812/1813 open publicly)
and the strange thing is that the majority of packets are handled fine by
FreeRADIUS (the ones that reach the daemon).

So, it appears although tcdump and radsniff shows the packet arriving, it
never gets to FreeRADIUS for some reason.

radsniff log (filtered for `norsp`)

norsp,7798,2019-07-16
23:08:43.462979,,Accounting-Request,ens4,1.2.3.4,41060,10.11.12.13,1813,125,"2a19172c7fc7"
norsp,7799,2019-07-16
23:08:43.463001,,Accounting-Request,ens4,1.2.3.4,36239,10.11.12.13,1813,13,"63b8136755ec"
norsp,7800,2019-07-16
23:08:43.463112,,Accounting-Request,ens4,1.2.3.4,38841,10.11.12.13,1813,125,"033c1a03cbdd"
norsp,7801,2019-07-16
23:08:43.463159,,Accounting-Request,ens4,1.2.3.4,38841,10.11.12.13,1813,241,"b9790286e557"
norsp,7802,2019-07-16
23:08:43.463331,,Accounting-Request,ens4,1.2.3.4,39990,10.11.12.13,1813,66,"710250b69ee0"
norsp,7803,2019-07-16
23:08:43.463454,,Accounting-Request,ens4,1.2.3.4,39990,10.11.12.13,1813,208,"b940c9c76e96"
norsp,7804,2019-07-16
23:08:43.463632,,Accounting-Request,ens4,1.2.3.4,38841,10.11.12.13,1813,187,"5ca284fb563e"
norsp,9042,2019-07-16
23:08:45.972261,,Accounting-Request,ens4,1.2.3.4,39990,10.11.12.13,1813,218,"2f5a67f71993"
norsp,9043,2019-07-16
23:08:45.972353,,Accounting-Request,ens4,1.2.3.4,39990,10.11.12.13,1813,13,"5e26718c4442"
norsp,9044,2019-07-16
23:08:45.972406,,Accounting-Request,ens4,1.2.3.4,39990,10.11.12.13,1813,15,"273bcbb553c8"
norsp,9045,2019-07-16
23:08:45.972514,,Accounting-Request,ens4,1.2.3.4,36239,10.11.12.13,1813,113,"b84e7246b3e3"
norsp,12595,2019-07-16
23:08:49.990914,,Accounting-Request,ens4,1.2.3.4,38841,10.11.12.13,1813,51,"51683f17d039"

So they DO reach the server, but DONT get processed for some reason.

Server is a Google Cloud compute VM instance utilising an Intel Xeon E5 v4
(Broadwell) @ 2.8GHz with 16GB RAM

Thanks

J