# How can I filter http/1.0 connection

**URL:** <https://discourse.haproxy.org/t/how-can-i-filter-http-1-0-connection/725>\
**Category:** Help!\
**Created:** [October 14, 2016, 7:18am UTC](https://discourse.haproxy.org/t/how-can-i-filter-http-1-0-connection/725 "2016-10-14T07:18:50Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![yanggis](https://avatars.discourse-cdn.com/v4/letter/y/3da27b/32.png) [@yanggis](https://discourse.haproxy.org/u/yanggis)\
**Post date:** [October 14, 2016, 7:18am UTC](https://discourse.haproxy.org/t/how-can-i-filter-http-1-0-connection/725/1 "2016-10-14T07:18:50Z")

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Dear folks,  
Now I use haproxy as a reverse proxy server which has a backend with four servers. I found some guys communicating with my servers with http/1.0 connection method. The log info is displayed as follows:

Oct 14 14:56:11 ubuntu-512mb-sfo1-01 haproxy[11514]: 131.135.222.29 proxy-balance/hrunchuun [status:400] (196) {|Dalvik/2.1.0 (Linux; U; Android 6.0.1; SM-G935F Build/MMB29K)} “CONNECT [ipservice.check.com:80](http://ipservice.check.com:80) HTTP/1.0”

However, one service ([ipservice.check.com](http://ipservice.check.com)) on the servers cannot process http/1.0 connection smoothly. So I want to setup the new service ([ipservice.check.com](http://ipservice.check.com)) on a new server to process http/1.0 connections. If a new http/1.0 connections with the new service ([ipservice.check.com](http://ipservice.check.com)) is established, I want haproxy send the session to my new server. I’ve created a new ACL rule, but it seems the acl rule doesn’t work as expected. The rule is:

use-server http\_1\_conn if { hdr\_dom(host) -i [ipservice.check.com](http://ipservice.check.com) }

Is it because the function hdr\_dom doest work with http/1.0 connection? or hdr\_dom is not proper for the scenario?

Please give me a hand, thank you very much!

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**Author:** ![lukastribus](https://avatars.discourse-cdn.com/v4/letter/l/7ea924/32.png) [@lukastribus](https://discourse.haproxy.org/u/lukastribus)\
**Post date:** [October 14, 2016, 7:06pm UTC](https://discourse.haproxy.org/t/how-can-i-filter-http-1-0-connection/725/2 "2016-10-14T19:06:42Z")

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It matches the Host header. If there is no host header, there is nothing to match.

I assume the request doesn’t contain the host header.