[FROG] Hostname / ISIS ?

HI I use FRRouting (version 7.0) and I have a small problem, it refuses to change the hostname for me. it forces the use of the full name of the machine. I put: C220-1.PAR4 and systematically it gives me c220-1.par4.mydomain.com including in the ISIS announcements It's normal ? also currently I access via SSH to the server then to FRR via vtyshy, is it possible to directly access FRRouting via telnet or SSH without going through the server access phase? thank you in advance for your help