[Devel] DNS caching and STUN support

[Bogdan-Andrei Iancu]

H Bruce,

Bruce Bauman wrote:

>The SER project has recently added dns cache support and STUN support. I
>have interest in both of these features.
>  
>
I'm not convinced that DNS cache is something to be placed inside the 
proxy - there a lot of implementations for DNS servers (with caching) 
and configuring a dedicated one for your SIP platform will solve the 
problem. Otherwise will end implementing a lot of stuff not related to 
SIP in the proxy (like DB engines, file system and whatever else).

But I do agree that we need to stick to the roadmap and have the DNS 
black list in place (for malicious or protected IPs). Also a system of 
dynamically populating this list based on runtime experience - hosts 
generating 408 with no reply, declined TCP connections, etc..


For STUN, again there are a lot of external implementations. I know that 
the RFC says that ideally the STUN traffic should be sent on the same 
port as signalling, but not sure how realistic (read "how used") is it.

regards,
bogdan