[SIPForum-discussion] Reg: Small doubt in SIP message..

Wed Jul 27 05:13:06 UTC 2011

In this case proxy will accept trusted domains or IPS & reject spoofed
ones, authentication & checking will be the better option to handle this.

On Tue, Jul 26, 2011 at 9:29 AM, Karthikeyan Selvaraj <
karthikeyan.selvaraj at sasken.com> wrote:

>  ** **
>
> ** **
>
> Hi, I know call originator can't send multiple TO and FROM.  ****
>
> ** **
>
> The senario is, the originator send the SIP request with single TO and FROM
> headers. ****
>
> Suppose some intruders (hackers), possible to add one more TO or FROM
> headers in the sip request. TO doesn't have any tag in the request. FROM
> contains the tag, so intruder add his won FROM header with some tag value.
> ****
>
> ** **
>
> In this case how the proxy will behave….****
>
> ** **
>
> ** **
>
> ** **
>
> Regards,****
>
> Karthikeyan S****
>
>  ****
>
> ** **
>
> *From:* Manoj Priyankara [mailto:manoj0915 at gmail.com]
> *Sent:* Tuesday, July 26, 2011 6:36 AM
> *To:* Karthikeyan Selvaraj
>
> *Subject:* Re: [SIPForum-discussion] Reg: Small doubt in SIP message..****
>
> ** **
>
> Hi, this is obvious. From and to headers represent the call originator and
> the termination. There is no meaning to have multiple from and to headers.
> Br, Manoj****
>
> On 26-Jul-2011 2:15 AM, "Karthikeyan Selvaraj" <
> karthikeyan.selvaraj at sasken.com> wrote:
> >
> > hi,
> > ya its correct. I know it,
> > Suppose, intruder hack my SIP message and possible to add one more TO or
> FROM header.
> > in these case what will happen in server side. either accept or reject.
> > There is no special rule for TO and FROM headers in RFC 3261.
> >
> >
> > Regards,
> > Karthikeyan S
> >
> >
> > From: tester voip [mailto:tester.voip1 at gmail.com]
> > Sent: Monday, July 25, 2011 5:03 PM
> > To: Karthikeyan Selvaraj
> > Cc: franz.edler at kabsi.at; discussion at sipforum.org
> > Subject: Re: [SIPForum-discussion] Reg: Small doubt in SIP message..
> >
> > Please think logicaly also.Is it possible to make a single call from
> different people to different people?
> > FOr example from your phone at the same time how many persons can make a
> call or to how many persons you can make a call.
> > Even if you are having one URI and numerous contacts, is it possible to
> make call to one/more than one person simultaneously from all the contacts.
> > Obviously no.
> > rite?
> > On Mon, Jul 25, 2011 at 4:35 PM, Karthikeyan Selvaraj <
> karthikeyan.selvaraj at sasken.com<mailto:karthikeyan.selvaraj at sasken.com>>
> wrote:
> > hi I checked with RFC3261 , they did't mention any thing about TO and
> FROM headers.
> >
> >
> > Regards,
> > Karthikeyan S
> >
> >
> > From: tester voip [mailto:tester.voip1 at gmail.com<mailto:
> tester.voip1 at gmail.com>]
>
> > Sent: Monday, July 25, 2011 3:53 PM
> > To: Karthikeyan Selvaraj
> > Cc: franz.edler at kabsi.at<mailto:franz.edler at kabsi.at>;
> discussion at sipforum.org<mailto:discussion at sipforum.org>
>
> >
> > Subject: Re: [SIPForum-discussion] Reg: Small doubt in SIP message..
> >
> > Via,Route,Record-Route,Contact(incase of Register) etc can have multiple
> numbers in a msg.
> >
> > But no such rules for TO and FROM headers.
> >
> > Please refer 3261 for more understanding of all the headers.
> >
> > Thanks
> > On Mon, Jul 25, 2011 at 3:47 PM, Karthikeyan Selvaraj <
> karthikeyan.selvaraj at sasken.com<mailto:karthikeyan.selvaraj at sasken.com>>
> wrote:
> > Hi ,
> > As per the below answer, the ROUTE header present in more than one and
> VIA header also.
> > So any special rules for TO and FROM headers.
> >
> >
> > Regards,
> > Karthikeyan S
> >
> >
> > From: tester voip [mailto:tester.voip1 at gmail.com<mailto:
> tester.voip1 at gmail.com>]
>
> > Sent: Monday, July 25, 2011 3:19 PM
> > To: franz.edler at kabsi.at<mailto:franz.edler at kabsi.at>
> > Cc: Karthikeyan Selvaraj; discussion at sipforum.org<mailto:
> discussion at sipforum.org>
>
> > Subject: Re: [SIPForum-discussion] Reg: Small doubt in SIP message..
> >
> > There will b 400 Bad request from UAS/B2B(if in between) as there cant b
> more than 1 such headers in INVITE.
> > On Mon, Jul 25, 2011 at 12:31 AM, Franz Edler <franz.edler at kabsi.at
> <mailto:franz.edler at kabsi.at>> wrote:
> >> suppose the sip message contains more than one TO and FROM headers.
> >> What will happen in server side?
> >> it take top most value or reject the message ?
> > It will (most probably) reject the message.
> >
> > BR
> > Franz
> >
> >
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