Daniel J Walsh:
Look for SELINUX_ERR, I believe you have a RBAC problem.
Right! Running ausearch, without "-m avc" which has become a bit of a
habit, revealed the reason.
You need to add something like
role unconfined_r types netid_t
Indeed, it complains about invalid context
unconfined_u:unconfined_r:netid_t:s0-s0:c0.c1023
Thanks a lot! Now I can continue my experimentation.