Re: [IPCop-user] IPCop and VoIP compatibility

[David W S. <da...@da...>]

Brad Morgan wrote:

> A non-profit that I provide IT support for is considering a purchase of a
> VoIP system from Intermedia. They provided the following to the
> non-profit. Does anyone know if IPCop is going to be an issue?
> 
>  
> 
> Thanks for your help.
> 
>  
> 
> Brad
> 
>  
> 
> General Linux firewalls/routers known Issues:
> 
> SIP ALG needs to be disabled.
> 
> A module that controls RTP traffic needs to be loaded.
> 
>  
> 
> Resolution:
> 
> Your IT or whoever setup the Linux firewall will need to make the changes
> below.
> 
>  
> 
> The site below explains that a kernel module nf_nat_sip needs to be
> unloaded
> in order to disable SIP ALG.  For RTP, the nf_conntrck_sip module needs to
> loaded to prevent audio problems.
> 
>  
> 
> The instructions below may vary slightly, depending on the variant of
> Linux.
> 
> http://wiki.freeswitch.org/wiki/ALG
> 
Both modules exist within IPCop but I have never seen either automatically 
loaded. 

-- 
Dave Studeman
http://www.raqcop.com