In haproxy : cannot. In nginx : possible. Backend Host: 1.2.3.4 Frontend Host: 2.2.2.2 location ^~ /its/ { proxy_buffering off; rewrite /its/(.*) /$1 break; proxy_pass http://1.2.3.4/; proxy_redirect default; sub_filter_once off; sub_filter ' href="/' ' href="/its/'; sub_filter ' src="/' ' src="/its/'; sub_filter ' src="http://1.2.3.4/' ' src="/its/'; sub_filter ' action="/' ' action="/its/'; } ex1. 2.2.2.2/its --> (2.2.2.2 connect to 1.2.3.4 ) 1.2.3.4/ 2.2.2.2/its/xxx <-- (2.2.2.2 response by 1.2.3.4 ) 1.2.3.4/xxx ex2. 2.2.2.2/its/aaa --> (2.2.2.2 connect to 1.2.3.4 ) 1.2.3.4/aaa 2.2.2.2/its/xxx <-- (2.2.2.2 response by 1.2.3.4 ) 1.2.3.4/xxx