[cisco-voip] Re: RTP Ports

[Dan Wing]

Hi.

Some Cisco products use that range, other Cisco products use other 
ranges, and some Cisco products allow the range to be configured.  
There isn't an industry standard, defacto standard, or IANA registry 
that specifies the UDP port or UDP port range for RTP traffic or 
non-RTP traffic.

I don't recommend using UDP port numbers as the only mechanism to 
permit, deny, or identify RTP packets.  The best mechanism available 
today is call signaling.  Call signaling identifies the UDP ports (and 
IP addresses) for media and that can be used to open and close the 
appropriate 3-tuple (destintation IP, protocol=UDP, destination port) 
or 5-tuple (source IP, destination IP, protocol=UDP, source port, 
destination port) in your firewall(s).

-d


On Jan 18, 2005, at 5:08 AM, Diego Costa wrote:

> Hi list!
>
>  
>
> Anybody knows which port range is used to RTP? I believe that cisco 
> uses 16384-32767 but what about the other vendors? I didn’t find any 
> information about the reserved range.
>
>  
>
> I would appreciate any help or comments.
>
>  
>
> Regards
>
> Diego
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