[Serusers] NAT and multiple proxy

[Klaus Darilion]

NAT traversal usually will be done by the proxy next to the nAT.

klaus

zeusng wrote:
> Consider the following scenario:
> 
> UA---NAT---Proxy1---Proxy2+UsrLoc
> 
> User agent UA is behind NAT which send a REGISTER request to Proxy2 but was
> instructed to use Proxy1 as the first hub. Which of the two proxies should
> rewrite the contact header. Note that Proxy1 does nothing but to forward all
> requests to Proxy2, something like:
> 
> Route[0] {
> 
>  check (max_forward_header & message_len);
>  record_route();
>  rewritehostport(proxy2:port);
>  t_relay();
> 
> }
> 
> 
> 
> Zeus Ng
> 
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