Download files over a Socks Proxy
$ scp -i <pem_key> -o ProxyCommand="nc -x localhost:<proxy_port> %h %p" <ec2_user>@<private_ip>:<file_path> <local_path>
Dump MongoDB and Create TAR File
$ mongodump --db <database_name> --out ./dump
$ tar czf dump_`date "+%Y-%m-%d"`.tgz ./dump