[Freeswitch-users] Is there a way for FS not to send back any response to INVITE

[Oleg Stolyar]

Thanks guys!  IP tables is how we block most traffic but we can only block
traffic by port.  In this case it's about invalid INVITES coming in on a
valid port.

Do you think this functionality would be useful?
Is it worth opening a feature request and perhaps putting a bounty on it?
Any idea of the effort?

On Wed, Jun 1, 2016 at 1:00 PM, Michael Jerris <mike at jerris.com> wrote:

> The only way with our current sip module to accomplish either of these
> would be to put a sip proxy out front to handle that behavior, or to
> somehow use iptables to block the traffic
>
> On Jun 1, 2016, at 3:40 PM, Oleg Stolyar <olegstolyar at gmail.com> wrote:
>
> Hi,
>
> In order to protect against scanning attacks I'd like for FS to not
> respond to INVITES unless they match certain conditions.
>
> I understand that currently FS always responds with 100 Trying right away
> before processing the call and then, if the call does not match anything in
> the dialplan, responds with a 302 Moved Temporarily.
>
> The 302 can be replaced with another response code (for example 403
> Forbidden which is what I am doing now) using the *respond* dialplan app.
>   However, that might encourage the scanner to keep trying.
>
> So I guess there are two questions:
>
> 1. Is there a way not to send back 100 Trying at all?
>
> 2. Is there a way to not send any final response?
>
>
>
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