First, you should not do user location lookup for REGISTER requests since the r-uri in these requests contains only proxy address.

Then, instead of next statement:

if (!lookup("location")) { sl_send_reply("404", "Not Found"); break; };

use

if (!lookup("location")) { t_relay_to_udp("proxy_address", "proxy_port"); break; };

in your config file. You should take care to avoid creating loops between proxies.

You can use forward_udp(...) instead of t_relay_to_udp(...) if you want stateless forwarding.

Daniel

On 12/13/04 09:10, szj wrote:

Hi:

I have one question to get help from you! If UA call a user by my SER Proxy, and SER can't find the called user in itself location, it will return 404"not found". But this is not What I want. What I want is to let SER forward the request except REGISTER to upper proxy?? How should I configure SER to get the goal ??? Thanks a lot for your help!

Best Regards

Sun Zongjun

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