rewrite proxy flag set problem

[niraj]

Hi

      I have write a one rewrite rule as below

rewrite /auction(.*)$ http://192.168.1.210$1;

This rewrite rule working fine for me. 

but the problem is it show the Ip address 192.168.1.210 also.

I want to hide this IP , for that in apache flage [P] is there. 

but Nginx I dont know how to set proxy flag [P]. Please guide for the
same.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,224274,224274#msg-224274