In my test of 1.5dev21, I found the following acl failed: acl my_host req.hdr(host) -m str www.mytest.com use_backend www if my_host
and result in an 503 error(because there is no default backend). I tried : 1. my_host req.hdr(host) -m beg www.mytest.com 2. my_host req.hdr(host) -m end www.mytest.com 3. my_host req.hdr(host) -m sub www.mytest.com and all of them works OK. I test it with "wget http://www.mytest.com/"; The haproxy debug output is : failed case: 00000001:ap.accept(0005)=0006 from [127.0.0.1:41462] 00000001:ap.clireq[0006:ffffffff]: GET / HTTP/1.0 00000001:ap.clihdr[0006:ffffffff]: User-Agent: Wget/1.12 (linux-gnu) 00000001:ap.clihdr[0006:ffffffff]: Accept: */* 00000001:ap.clihdr[0006:ffffffff]: Host: www.mytest.com 00000001:ap.clihdr[0006:ffffffff]: Connection: Keep-Alive 00000001:ap.clicls[0006:ffffffff] 00000001:ap.closed[0006:ffffffff] success case: 00000001:ap.accept(0005)=0006 from [127.0.0.1:41460] 00000001:ap.clireq[0006:ffffffff]: GET / HTTP/1.0 00000001:ap.clihdr[0006:ffffffff]: User-Agent: Wget/1.12 (linux-gnu) 00000001:ap.clihdr[0006:ffffffff]: Accept: */* 00000001:ap.clihdr[0006:ffffffff]: Host: www.mytest.com 00000001:ap.clihdr[0006:ffffffff]: Connection: Keep-Alive 00000001:www.srvrep[0006:0007]: HTTP/1.1 200 OK 00000001:www.srvhdr[0006:0007]: Date: Mon, 23 Dec 2013 07:40:30 GMT 00000001:www.srvhdr[0006:0007]: Server: Apache/2.2.8 (Win32) mod_python/3.3.1 Python/2.5.4 00000001:www.srvhdr[0006:0007]: Last-Modified: Tue, 20 Aug 2013 09:18:56 GMT 00000001:www.srvhdr[0006:0007]: ETag: "100000000fb2d-440-4e45d8be15ee8" 00000001:www.srvhdr[0006:0007]: Accept-Ranges: bytes 00000001:www.srvhdr[0006:0007]: Content-Length: 1088 00000001:www.srvhdr[0006:0007]: Connection: close 00000001:www.srvhdr[0006:0007]: Content-Type: text/html 00000001:www.srvcls[0006:0007] 00000001:www.clicls[0006:0007] 00000001:www.closed[0006:0007] BR, DeltaY
