...
See the main S3DF documentation for detailed information about how to log in, use the SLURM batch system, and so on. Specify --partition roma,milano.
Basically, ssh to s3dflogin.slac.stanford.edu and from there ssh to iana (no .slac.stanford.edu) to do actual interactive work. The login nodes are not meant for doing analysis or accessing data. Of course, real computational intensive tasks are meant for the batch system and not the interactive nodes either.
...