[Users] symmetric fw

[Paul van Schagen]

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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