[Serusers] avpops and ip based auth

[Greger V. Teigre]

I would say that as allow_trusted uses a cached (and I believe hashed) list 
of IP addresses to match against, it is better suited for non-(or low) 
dynamic data like trusted peers etc. avpops is better suited for subscriber 
specific operations (as avpops will do the DB every time) and thus larger 
number of IPs and dynamic data.
    Are you thinking about storing the IPs with avp_db_store for each 
register and then just allow any IP you have stored?  This would save you 
some DB cycles probably (and some SIP messages) as you only do one lookup 
and no digest challenge for INVITEs.  You would then allow anybody behind a 
given NAT and again IP-based auth on UDP is not really secure.
    And of course, you would probably need a way to expire the IPs?!

Or have I misunderstood completely? What are you trying to achieve?
g-)

Iqbal wrote:
> allow_trusted I already use, just wanted to know which is better, or
> is it just personal preference here. If either is used and looking by
> the acc table billing could still be pulled even thought no
> username/password..any inputs here.
>
> Iqbal
>
> On 6/23/2005, "Greger V. Teigre" <greger at teigre.com> wrote:
>
>> Have you looked at allow_trusted() in (I believe) the domain module.
>> In fact, when I come to think of it, maybe the functions are
>> undocumented. I'm on GPRS right now, but I'll check when I get back
>>    over the weekend. You populate the trusted table and use
>> allow_trusted() before auth of INVITE's (and probably assume that
>> you don't get REGISTERs). There is also a FIFO command to reload the
>> trusted table. I guess it's feasible to use REGISTER to store a new
>> IP after a successful auth and then use IP for INVITE's.
>>    Ref. an earlier discussion, using IP for UDP is not really good
>> security-wise, you should use TCP.
>> g-)
>>
>> Iqbal wrote:
>>> Hi
>>>
>>> If I use avpops for IP based auth, and drop the normal
>>> username/password combo aside from spoofing what is the downside if
>>> any. Also if I do IP based auth, can I auth once, and be done with
>>> it, or is it auth once per call, I guess its once per call, if so is
>>> there any way to bypass auth completely for a particular IP address,
>>> again I am assuming no, since the IP will still need to be checked
>>> for each request.
>>> Iqbal
>>>
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