[SIPForum-discussion] should UA accept SIP INVITE destined to a different domain than was initially registered to

[Keith Lin]

Hi Hemant,


TO header will not be modified?
In my case, the TO header was modified, so should my UA accept this INVITE
still?


regards,
Keith

2011/10/6 Hemant Kumar <uniqhemant at gmail.com>

> Hi,
>
> Ideally it should accept it.
>
> Think of a scenario in which call is being redirected by a proxy as the
> called party(callee at a.com) is not available.
> There is a possibility that the  call is redirected to a user(
> redirected at b.com) belonging to a different domain than the called party.
> In this case the TO header will not be modified but Request URI will be
> modified to redirected at b.com.
>
> Regards,
> Hemant
>
>
> On Tue, Oct 4, 2011 at 1:55 PM, Keith Lin <iamchiaweilin at gmail.com> wrote:
>
>> Hi everyone,
>>
>>
>> My question is "Should an UA accept SIP INVITE, whose "to header" field
>> contains a different domain than
>> the one that this UA initially registered with?"
>>
>> Let me use an example to illustrate my question again:
>>
>> (1) an UA registered with a proxy say a.com
>>      let's say this UA has an URI of 111 at a.com
>>
>> (2) if this UA receives an INVITE with to header field 111 at b.com
>> Should it accept this invite?
>>
>> because I initially registered with a.com, an incoming request is
>> destined to b.com
>> wouldn't there be a security problem if this request is accepted?
>>
>> Thank you guys~
>>
>>
>>
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>>
>
>
> --
> - Hemant
>
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