Install ipkg on synology

To install ipkg (alternative package manager to install further packages on synology):

login as root on your synology via terminal: ssh root@synologyIP

(synologyIP has to be the IP of your Synology or the corresponding host name).

Go to following page an determine the CPU of your synology:
http://forum.synology.com/wiki/index.php/What_kind_of_CPU_does_my_NAS_have

Get the correct bootstrap for your CPU:
http://forum.synology.com/wiki/index.php/Overview_on_modifying_the_Synology_Server%2C_bootstrap%2C_ipkg_etc#Bootstrap

for the DS210+ it is syno-e500-bootstrap_1.2-7_powerpc.xsh, so get it with wget

wget http://ipkg.nslu2-linux.org/feeds/optware/syno-e500/cross/unstable/syno-e500-bootstrap_1.2-7_powerpc.xsh

run it:

sh syno-e500-bootstrap_1.2-7_powerpc.xsh

update ipkg

ipkg update