Then check if the SHA512 hash matches, and note that while SHA512 collisions aren't impossible this is considerably more difficult especially while also matching the MD5 and the file-size and being a bootable image with a valid signature from Cisco:Ĭertutil -hashfile sha512 | findstr /v CertUtil Then check if the MD5 hash matches, although note that MD5 collisions are certainly feasible:Ĭertutil -hashfile md5 | findstr /v CertUtil Say you "found" a copy of that file that you might think is sketchy, what can you do to test this?ĭir /w | findstr File(s) 1 File(s) 56,187,628 bytes Say you want to validate "".Įven without a valid account or without logging in, if you mouse over the file name and it will tell you:ĭescription : ADVANCED ENTERPRISE SERVICESįileName : It is quite easy to compare an image that might have fallen off the back of a truck to the official source without even needing a account, without having to worry about malware. The file size and hash(s) are both known and easy to calculate for most any Cisco image. You can find free Cisco dynamips but I would not recommend you to do it beacuse those images could contain malware and other stuff.
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