Router 2821 doesn't have SSH

[Adam.habbati1]

Hi Folks

I was trying to configure SSH V2 for my 2821 Router but i couldn't find any crypto key option nor Transport input SSH inside the console line VTY 0 4.

By digging in the web i have figured out that my router version doesn't have K9 patch for security . 

What i do want actually is that if i can update the IOS From 56i to K9  and how i can find the IOS .

Thank you 

[Leo Laohoo]

2821 IOS can be found HERE.

[Adam.habbati1]

Thank you Leo but there's too many version, how can i choose the basic IOS for my router which it has 256 DRAM/64 FLASH

[Leo Laohoo · Accepted solution]

Each version will have a summary view. The summary view will also display DRAM and Flash minimum requirement.