Comments on: Recovery EPROM Cookie on Router Cisco http://www.tech-recipes.com/rx/982/recovery-eprom-cookie-on-router-cisco/ Computer and technology tutorials and guides Thu, 09 Feb 2012 21:01:25 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Keshava http://www.tech-recipes.com/rx/982/recovery-eprom-cookie-on-router-cisco/comment-page-1/#comment-50771 Keshava Wed, 19 Oct 2011 17:36:56 +0000 guid-fix-me!#comment-50771 Hello all, How do we find the cpu_type for the router cisco1841....and how to edit that in the Priv mode.... Please mail me @ keshava3564@gmail.com Hello all,

How do we find the cpu_type for the router cisco1841….and how to edit that in the Priv mode….
Please mail me @ keshava3564@gmail.com

]]> By: Derek http://www.tech-recipes.com/rx/982/recovery-eprom-cookie-on-router-cisco/comment-page-1/#comment-48535 Derek Sun, 22 May 2011 16:55:00 +0000 guid-fix-me!#comment-48535 Password for example above. First line 01 01 00 04 27 fe 00 ea 81 00 01 ff 01 ff 00 00 Add in hexidecimal calculator following values 0101 0004 27fe 00ea 8100 ------------ aaed Password for example above.
First line 01 01 00 04 27 fe 00 ea 81 00 01 ff 01 ff 00 00
Add in hexidecimal calculator following values
0101
0004
27fe
00ea
8100
————
aaed

]]> By: Lostedcisco http://www.tech-recipes.com/rx/982/recovery-eprom-cookie-on-router-cisco/comment-page-1/#comment-43798 Lostedcisco Mon, 08 Nov 2010 14:16:00 +0000 guid-fix-me!#comment-43798 Decrypting the priv password is easy. Just add the first five words of the cookie. For some older routers, that's enough. But if the generated password is more than 4 hex numbers long, then mod that number with 0x10000. Or just take the rightmost 4 hex numbers from the 5 or 6 digit number you've generated. Decrypting the priv password is easy. Just add the first five words of the cookie. For some older routers, that’s enough. But if the generated password is more than 4 hex numbers long, then mod that number with 0×10000. Or just take the rightmost 4 hex numbers from the 5 or 6 digit number you’ve generated.

]]> By: Anonymous http://www.tech-recipes.com/rx/982/recovery-eprom-cookie-on-router-cisco/comment-page-1/#comment-37118 Anonymous Tue, 26 Jan 2010 23:50:00 +0000 guid-fix-me!#comment-37118 SWEET DUDE!!! Got a Cisco 831 with the exact same problem... All tho i tried with your cookie first and ended up with a ATM router with a Ethernet swtich attached?!?!? Hahahaha!!! Anyways for the 831 the e_machine is 129 and cpu_type is 62. In other words byte 0×08-0×08 – Processor (Recommended Value: 0×3e): 3e then do byte 0×08-0×08 – Processor (Recommended Value: 0×3e): 81 (129 in HEX) And bytes 0×25-0×2c: 00 00 00 00 ff ff ff 50 (50 should be cpu_type) use 62 so that'll be: bytes 0×25-0×2c: 00 00 00 00 ff ff ff 62 My final Cisco 831 cookie looks like this: 01 01 00 04 27 fe 00 ea 81 00 01 ff 01 ff 00 00 00 00 00 00 00 00 00 00 4a 41 44 05 42 30 39 00 00 03 01 6f e6 00 00 00 00 ff ff ff 62 04 49 11 ec 03 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff By the way, i stole your mac address!! :P Ohh yes almost forgot, if you mistype and need to reenter or alter your cookie, the priv password has changed (its generated out of the cookie values) use this website to "decrypt" the new password (just pasted your new password and click calculate) http://www.bitshift.ch/eng/support/kbase/000002.asp SWEET DUDE!!! Got a Cisco 831 with the exact same problem… All tho i tried with your cookie first and ended up with a ATM router with a Ethernet swtich attached?!?!? Hahahaha!!!

Anyways for the 831 the e_machine is 129 and cpu_type is 62. In other words
byte 0×08-0×08 – Processor (Recommended Value: 0×3e): 3e then do
byte 0×08-0×08 – Processor (Recommended Value: 0×3e): 81 (129 in HEX)

And

bytes 0×25-0×2c: 00 00 00 00 ff ff ff 50 (50 should be cpu_type) use 62
so that’ll be:
bytes 0×25-0×2c: 00 00 00 00 ff ff ff 62

My final Cisco 831 cookie looks like this:
01 01 00 04 27 fe 00 ea 81 00 01 ff 01 ff 00 00
00 00 00 00 00 00 00 00 4a 41 44 05 42 30 39 00
00 03 01 6f e6 00 00 00 00 ff ff ff 62 04 49 11
ec 03 ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

By the way, i stole your mac address!! :P

Ohh yes almost forgot, if you mistype and need to reenter or alter your cookie, the priv password has changed (its generated out of the cookie values)
use this website to “decrypt” the new password (just pasted your new password and click calculate) http://www.bitshift.ch/eng/support/kbase/000002.asp

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