you can very well do it via FTP over vrfe.g.copy ftp://root:root@18.9.0.252;MGMT/ harddisk:/ 

 on side note you can use logging archive to log it on device like disk/harddisk.

can u explain more about 'bot' login how that to be done ?

I am not aware of full picture of your network but what I meant was why don't you use l2 acl on respective port and choose smac X (some specifc MAC) and dst mac Y which you want to pass thru for this neighbor rest you can drop/deny or visa-versa,more...