[OpenSIPS-Users] Reducing INVITE delay until UAC sees 180 RINGING

[Bogdan-Andrei Iancu]

Hi Brian,

rev_dns affects two scenarios:
- comparisons with domains in script ( like src_ip=="foo.bar") - reverse 
DNS will be done on foo.bar
- internal checks of IPs against SIP uri / SIP hosts (like checking for 
VIA matching, for src IP nat, etc)

Shortly, if when doing IP versus IP/domain checks, if reverse DNS should 
be done if "domain"

Regards,
Bogdan

opensipslist at encambio.com wrote:
> Hello list,
>
> An ven., déc 18, 2009, opensipslist at encambio.com schrieb:
>   
>> I'm assuming that a delay of 1 second is reachable through config
>> tuning, and wondering as well what kind of result (in terms of delay
>> time) the maximum tuning yields. Already I've looked at things like:
>>
>>  disable_dns_blacklist
>>  disable_dns_failover
>>
>> ...because DNS resolutions is a logical place to start reducing.
>>
>> Any ideas? Is there documentation about this?
>>
>>     
> The OpenSIPS documentation is excellent of course, but sadly lacking
> information about such core parameters as those above and 'rev_dns'
> relating to when and how often they effect performance. For example,
> does 'rev_dns = yes' mean that a reverse lookup takes place once at
> startup, every time the route script is entered, once a new
> transaction begins, dialog...
>
> There are a lot of parameters where it's not clear when and how
> often they effect performance, or am I missing something?
>
> Regards,
> Brian
>
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>   


-- 
Bogdan-Andrei Iancu
www.voice-system.ro