Re: Review of draft-ietf-nextext-radius-pmip6

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Message-Authenticator should be mandatory (1 1 1 1).



On Jan 10, 2012, at 22:30, "jouni korhonen" <jouni.nospam@xxxxxxxxx> wrote:

> Bernard,
> 
> Thank you for your review. See my comments inline.
> 
> 
> On Jan 10, 2012, at 8:37 PM, Bernard Aboba wrote:
> 
>> The document appears to contain typos in sections 4.16 and 4.17.   
>> 
>> In section 4.16, it appears that "Home LMA IPv6 address" should be replaced by "Home DHCPv6 server address":
> 
> Blimey.. we'll fix this.
> 
>> 4.16.  PMIP6-Home-DHCP6-Server-Address
>> 
>> 
>> 
>>    0                   1                   2                   3
>>    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
>>   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>>   |      Type     |   Length      |  Home DHCPv6 server address
>>   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>>                     Home DHCPv6 server address
>>   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>>                     Home DHCPv6 server address
>>   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>>                     Home DHCPv6 server address
>>   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>>        Home LMA IPv6 address      |
>>   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>> 
>> In Section 4.17, it appears that "Visited LMA IPv6 address" should be replaced by "Visited DHCPv6 server address":
> 
> And the same here..
> 
> 
>> 
>> 4.17.  PMIP6-Visited-DHCP6-Server-Address
>> 
>> 
>>    0                   1                   2                   3
>>    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
>>   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>>   |      Type     |   Length      | Visited DHCPv6 server address
>>   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>>                    Visited DHCPv6 server address
>>   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>>                    Visited DHCPv6 server address
>>   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>>                    Visited DHCPv6 server address
>>   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>>      Visited LMA IPv6 address     |
>>   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>> 
>> 
>> 5.2.  Table of Attributes
>> 
>> 
>>   The following table provides a guide to attributes that may be found
>>   in authentication and authorization RADIUS messages between MAG and
>>   the AAA Server.
>> 
>> 
>> Request Accept Reject Challenge #  Attribute
>> 
>>   0-1     0-1    0-1    0-1      80  Message-Authenticator
>> 
>> 
>> 
>> [BA] The Message-Authenticator attribute is mandatory-to-implement in a number of 
>> RADIUS usages, including EAP (RFC 3579).  Leaving out Message-Authenticator could 
>> result in Access-Requests lacking authentication and
>> integrity protection.  RFC 6158 Section 3.1 states:
> 
> Good point. So, you are saying that we should have:
> 
>   1       0-1    0-1    0-1      80  Message-Authenticator
> 
> or would 
> 
>   1       1      1      1        80  Message-Authenticator
> 
> be even better as RFC3759 & 5090 do?
> 
> 
> - Jouni
> 
> 
> 
>> 
>>   While [RFC2865] did not require authentication and integrity
>>   protection of RADIUS Access-Request packets, subsequent
>>   authentication mechanism specifications, such as RADIUS/EAP [RFC3579]
>>   and Digest Authentication [RFC5090], have mandated authentication and
>>   integrity protection for certain RADIUS packets.  [RFC5080], Section
>>   2.1.1 makes this behavior RECOMMENDED for all Access-Request packets,
>>   including Access-Request packets performing authorization checks.  It
>>   is expected that specifications for new RADIUS authentication
>>   mechanisms will continue this practice.
>> 
>> 
>> 
>> 
>> 
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> 
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