[cisco-voip] Re: RTP ports

Tue Oct 12 17:45:55 EDT 2004

Volodymyr Yakovenko wrote:
> On Tue, Oct 12, 2004 at 01:59:51PM +0400, Aleksey Sosnin wrote:
> 
>>Hello,
>>
>>RTP port number should be in the range 16384-32767 or 49152-65535.
> 
> 
> Can you point me to any documents, describing 49152-65535 ports usage
> for RTP on Cisco equipment?

looks like these ports are used by Cisco for DNS and other signaling:

from: 
http://www.cisco.com/en/US/products/products_security_advisory09186a008021b9b5.shtml
" ... Cisco IOS uses ports in the range 49152 to 65535 as the source 
port for outbound sessions such as DNS queries. ..."

klaus