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<P><FONT SIZE=2 FACE="Arial">Hi,</FONT>
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<P><FONT SIZE=2 FACE="Arial">I'm using UAC module in order to centralized authentication when I need to use an external proxy server to call PSTN numbers. To use it, I use a unique tuple login/pwd/domain</FONT></P>
<P><FONT SIZE=2 FACE="Arial">The environment is:</FONT>
<BR><FONT SIZE=2 FACE="Arial">My openser handles the domain: "myopenserdomain.com"</FONT>
<BR><FONT SIZE=2 FACE="Arial">For each INVITE or REGISTER of SIP client of this domain, I force the authentication</FONT>
<BR><FONT SIZE=2 FACE="Arial">The external proxy handles the domain "externaldomain.com"</FONT>
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<P><FONT SIZE=2 FACE="Arial">Now I have two questions:</FONT>
<BR><FONT SIZE=2 FACE="Arial">1) before to send an INVITE to the external proxy, must I change the contact header with the correct information of the tuple login/pwd/domain ? Or I must wait the 401 or 407 message before ? In fact I tests several external proxy. Some are waiting a contact header with the information of the tuple and some don't. What is the correct way to do this ?</FONT></P>
<P><FONT SIZE=2 FACE="Arial">2) Some of this external proxy accept only my INVITE (with or without contact header modified) if I registered first on it ! I receive 403 message in this situation. But I don't know how to REGISTER first since I don't find any openser module to that … How can I handle this situation ?</FONT></P>
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<P><FONT SIZE=2 FACE="Arial">Thanks,</FONT>
<BR><FONT SIZE=2 FACE="Arial">Regards,</FONT>
<BR><FONT SIZE=2 FACE="Arial">Christophe</FONT>
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