[OpenSIPS-Users] Realtime monitoring of registered end-points

[Ionut Ionita]

Hi Nabeel,

     You've got the sipping_bflag which enables sip OPTIONS ping for a 
contact and remove_on_timeout_bflag which enables removing a contact 
after max_pings_lost were not responded, the maximum accepted response 
time for a ping being ping_threshold.
     By default the SIP OPTIONS ping is not activated, so you have to 
enable those 2 flags and set them for each contact you want to ping.

Regards,
Ionut Ionita

On 12/13/2015 07:51 PM, Nabeel wrote:
>
> Hi,
>
> Are these features enabled by default in the latest version of 
> OpenSIPS (2.2.x) + NAT script?  Or do they need to be enabled manually?
>
> On 1 Oct 2015 09:33, "Ionut Ionita" <ionutionita at opensips.org 
> <mailto:ionutionita at opensips.org>> wrote:
>
>     *Hello all,
>
>         I’m glad to announce a new feature that allows OpenSIPS to monitor
>     (via SIP OPTIONS probing) and disable/delete in realtime the
>     registrations
>     which are not responding.
>         The previous approach had two issues when came to so called
>     “zombie”
>     registrations (registrations which are not valid anymore):
>         * resources - such zombie registrations may waste resources in
>     your
>     OpenSIPS server (memory,  processing time, DB space, useless NAT
>     pinging,
>     TCP connect attempts);
>         * user experience - using the zombie registration to reach
>     un-existing
>     users translates into useless calls (calls that will simply timeout),
>     giving delays in the call setup (instead of going straight to VM,
>     you may
>     burn 5-10 seconds in trying to reach the user);
>         The main idea  behind these features is to delete contacts
>     that do not
>     respond to a certain number of SIP pings. The SIP pinging is
>     provided by the
>     nathelper module which was enhanced to keep the state of each
>     pinging requests
>     (basically, the module is waiting and checking the reply of each
>     SIP request
>     sent to the registered users). For registrations detected as
>     “dead” (not responding),
>     the nathelper module interacts directly with the usrloc module in
>     order to
>     remove the zombie contact.
>         For usage perspective, the nathelper module now has two new
>     parameters:
>         * ping_threshold - timeout to consider a ping as unanswered;
>         * max_pings_lost - the number of unresponded pings after which
>     the contact is
>     removed from usrloc;
>         In order to activate this feature, every contact must have the
>     sipping_bflag
>     (to be pinged) and remove_on_timeout_bflag (to be deleted on
>     no-answer) activated.
>     This means these flags must also be configured in the nathelper
>     module. [0]
>         For full documentation of the nathelper module including the
>     newly added
>     feature see [1]. Any feedback is highly appreciated.
>
>     Regards,
>     Ionut Ionita
>
>     [0]http://www.opensips.org/html/docs/modules/2.2.x/nathelper.html#id248011
>     [1]http://www.opensips.org/html/docs/modules/2.2.x/nathelper.html
>     *
>
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