Which node is my job running on?

qstat -as1 will show which node your job is running on.

I can't submit a job from

The secure front end is not a submission node. You need to log into cfe from sfe in order to submit jobs. SFE's only purpose is a secure gateway to Charlie.

Error: too many failed attempts to run

Check that user is on execution nodes (e.g. c1 and c2) and that uid/gid are same as server (cfe).