Re: OSPF Authentication Methods - (3) [7:134182]

Checks in the mail, right? If I click the link do I get a free iPod
or something? :)

On Fri, May 20, 2011 at 9:53 AM, Darby Weaver <darby.weaver_at_gmail.com> wrote:
> I'm working on the $1400.00 vouchers but I only tell people how to do this
> who like my link on linkedin...
>
> There are ways... and some of them actually work.
>
> I've actually received 1 free voucher to the CCIE Lab so far.
>
> I'm eligible for another.
>
>
>
> Darby
>
>
> On Fri, May 20, 2011 at 9:35 AM, James Poplawski <jb.poplawski_at_gmail.com>
> wrote:
>>
>> They're offering lab vouchers?
>>
>> Sent from my iPhone
>>
>> On May 20, 2011, at 8:21 AM, Darby Weaver <darby.weaver_at_gmail.com> wrote:
>>
>> > Kewl - I've heard CCIE instructors state that since Null authentication
>> > is
>> > not either Plain text or MD5, then it was not a method.
>> >
>> > Um.. That can be a killer and cost points due inability to interpret
>> > especially when a candidate rules out the option as acceptable since a
>> > CCIE
>> > instructor told them otherwise.
>> >
>> > Ouch!
>> >
>> > Nothing like being taught to fail... quite successfully.
>> >
>> > FYI - If you get a chance can you visit linkedin, join the group, and
>> > click
>> > on the Like button to like my link please:
>> >
>> >
>> >
>> > http://www.linkedin.com/groupAnswers?viewQuestionAndAnswers=&discussionID=54123549&gid=3443017&commentID=39652172&trk=view_disc
>> >
>> > I'm trying to win a free exam voucher.
>> >
>> >
>> > Darby
>> >
>> > http://www.darbyslogs.blogspot.com
>> >
>> > On Fri, May 20, 2011 at 8:52 AM, manoj kaushal <kaushalpec_at_gmail.com>
>> > wrote:
>> >
>> >> I read about it in CCNP ROUTE book
>> >>
>> >> 1. NULL
>> >> 2. Plain text
>> >> 3. MD5
>> >>
>> >> On Fri, May 20, 2011 at 5:58 PM, Darby Weaver
>> >> <darby.weaver_at_gmail.com>wrote:
>> >>
>> >>> That's what I love about the CCIE Lab...
>> >>>
>> >>> Everyone says there are "only" 2 types of authentication in OSPF....
>> >>>
>> >>> 1. Plain text
>> >>> 2. MD5
>> >>>
>> >>> If you listen to all your most knowledgeable friends on Groupstudy and
>> >>> a
>> >>> couple of three (maybe more CCIE's of some repute)...
>> >>>
>> >>> And then you find yourself in the "gladiator's chamber" one day... and
>> >>> a
>> >>> third is suggested by some hint of a vague clue...
>> >>>
>> >>> Unless you've heard of RFC2328 and then you find... there is a
>> >>> third...
>> >>> and
>> >>> you find yourself astonished in about the same way everyone else was
>> >>> when
>> >>> we
>> >>> found out that Luke Skywalker was not quite "The Last Hope" as
>> >>> mentioned
>> >>> by
>> >>> Yoda... Yep... there are three...
>> >>>
>> >>>
>> >>> OSPF as defined in
>> >>> [RFC2328]
>> >>> includes three different types of
>> >>> authentication schemes: Null authentication, simple password and
>> >>> cryptographic authentication. NULL authentication is akin to having
>> >>> no authentication at all. In the simple password scheme of
>> >>> authentication, the passwords are exchanged in the clear text on the
>> >>> network and anyone with physical access to the network can learn the
>> >>> password and compromise the security of the OSPF domain.
>> >>>
>> >>> In the cryptographic authentication scheme, the OSPF routers on a
>> >>> common network/subnet share a secret key which is used to generate a
>> >>> keyed MD5 digest for each packet and a monotonically increasing
>> >>> sequence number scheme is used to prevent replay attacks.
>> >>>
>> >>>
>> >>>
>> >>>
>> >>> --
>> >>> Darby Weaver
>> >>> Network Engineer
>> >>> http://www.darbyslogs.blogspot.com
>> >>>
>> >>> darbyweaver_at_yahoo.com
>> >> --
>> >> Kaushal
>> >>
>> >>
>> >
>> >
>> > --
>> > Darby Weaver
>> > Network Engineer
>> > http://www.darbyslogs.blogspot.com
>> >
>> > darbyweaver_at_yahoo.com
>> >
>> >
>> > Blogs and organic groups at http://www.ccie.net
>> >
>> > _______________________________________________________________________
>> > Subscription information may be found at:
>> > http://www.groupstudy.com/list/CCIELab.html
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>
>
>
> --
> Darby Weaver
> Network Engineer
> http://www.darbyslogs.blogspot.com
>
> darbyweaver_at_yahoo.com

Blogs and organic groups at http://www.ccie.net
Received on Fri May 20 2011 - 11:18:07 ART