2013-05-11 06:00:53 +00:00
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#
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# This is an example of how to configure HAProxy to be used as a 'full transparent proxy' for a single backend server.
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#
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# Note that to actually make this work extra firewall/nat rules are required.
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# Also HAProxy needs to be compiled with support for this, in HAProxy1.5-dev19 you can check if this is the case with "haproxy -vv".
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#
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global
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2015-10-13 13:46:50 +00:00
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defaults
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timeout client 30s
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timeout server 30s
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timeout connect 30s
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2013-05-11 06:00:53 +00:00
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frontend MyFrontend
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bind 192.168.1.22:80
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default_backend TransparentBack_http
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backend TransparentBack_http
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mode http
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source 0.0.0.0 usesrc client
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server MyWebServer 192.168.0.40:80
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#
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# To create the the nat rules perform the following:
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#
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# ### (FreeBSD 8) ###
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# --- Step 1 ---
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# ipfw is needed to get 'reply traffic' back to the HAProxy process, this can be achieved by configuring a rule like this:
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# fwd localhost tcp from 192.168.0.40 80 to any in recv em0
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#
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# The following would be even better but this did not seam to work on the pfSense2.1 distribution of FreeBSD 8.3:
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# fwd 127.0.0.1:80 tcp from any 80 to any in recv ${outside_iface} uid ${proxy_uid}
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#
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2020-06-21 16:42:57 +00:00
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# If only 'pf' is currently used some additional steps are needed to load and configure ipfw:
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2013-05-11 06:00:53 +00:00
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# You need to configure this to always run on startup:
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#
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# /sbin/kldload ipfw
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# /sbin/sysctl net.inet.ip.pfil.inbound="pf" net.inet6.ip6.pfil.inbound="pf" net.inet.ip.pfil.outbound="pf" net.inet6.ip6.pfil.outbound="pf"
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# /sbin/sysctl net.link.ether.ipfw=1
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# ipfw add 10 fwd localhost tcp from 192.168.0.40 80 to any in recv em0
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#
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2018-11-14 04:01:24 +00:00
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# the above does the following:
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2020-06-21 16:42:57 +00:00
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# - load the ipfw kernel module
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2013-05-11 06:00:53 +00:00
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# - set pf as the outer firewall to keep control of routing packets for example to route them to a non-default gateway
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# - enable ipfw
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2018-11-14 04:01:24 +00:00
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# - set a rule to catches reply traffic on em0 coming from the webserver
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2013-05-11 06:00:53 +00:00
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#
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# --- Step 2 ---
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2020-06-21 16:42:57 +00:00
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# To also make the client connection transparent its possible to redirect incoming requests to HAProxy with a pf rule:
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2013-05-11 06:00:53 +00:00
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# rdr on em1 proto tcp from any to 192.168.0.40 port 80 -> 192.168.1.22
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# here em1 is the interface that faces the clients, and traffic that is originally send straight to the webserver is redirected to HAProxy
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#
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# ### (FreeBSD 9) (OpenBSD 4.4) ###
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# pf supports "divert-reply" which is probably better suited for the job above then ipfw..
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#
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