Gopu Krishnan [mailto:[email protected]] wrote:
> 
> Hi All,
> 
> I am trying to connect Microsoft initiator and Linux target. 
> Am trying to understand how the bidirectional chap happens.
> 
> What is the CHAP_N will be send between the Microsoft 
> initiator and target and vice-versa. Is there is any 
> functionality differnce between the both?
> I also would like to know where we specify target secret and 
> initiator secret in Microsoft initiator.
> 
> Moreover am clear with Linux initiator and Linux target 
> communication with respect to chap.

Ok, here is how CHAP works.

For incoming initiators only:

Configure an IncomingUser, typically the initiator's IQN but you can use a 
generic name that all initiators can use, then a space then a password which 
MUST be a minimum of 12 characters and a maximum of 16 characters.

You can configure multiple IncomingUser CHAP users, one for each initiator if 
you wish, or like above configure one that all initiators use.

For bi-directional:

Configure the IncomingUser CHAP users like above, then, configure ONE 
OutgoingUser, for compatibility with Microsoft initiator and probably others it 
should be the target's IQN, followed by a space, then a password which MUST be 
a minimum of 12 characters and a maximum of 16 characters.

The IncomingUser and OutgoingUser passwords MUST NOT match.

When you log in with the Microsoft initiator with one-way CHAP you can specify 
the name and password under the Advanced settings tab, to do bi-directional 
CHAP with Microsoft you need to configure the secret that ALL targets will use 
to authenticate against under the "General" tab. The "Secret" defined under the 
Microsoft initiator "General" tab MUST match the OutgoingUser password. Then 
when logging in with the MS initiator you specify the IncomingUser name and 
password, then check the box "Perform Mutal Authentication".

I'm not sure about bi-directional CHAP and open-iscsi, but there are plenty of 
examples of one-way CHAP.

-Ross

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  • Chap implementaion Gopu Krishnan
    • RE: [Iscsitarget-devel] Chap implementaion Ross S. W. Walker

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