Just use mediaproxy+mediaproxy module or rtpproxy+nathelper module.

To detect if a client is behind symmetric NAT usually nat_uac_test(2) is sufficient (except when there are broken clients)

regards
klaus

Paul van Schagen wrote:
Hi,

I am using STUN and that works well most of the time.
I do have a problem with UA’s  who sit behind a symmetric firewall.

( a Microsoft server with ISA 2004 to be exact ).  I understand this

is a well known problem. What practical solutions can I use in

combination with openser ?

Thanks for any help

Best regards

Paul van Schagen


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