6. Source balancing

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6. Source balancing
===================

Sometimes it may reveal useful to access servers from a pool of IP addresses
instead of only one or two. Some equipments (NAT firewalls, load-balancers)
are sensible to source address, and often need many sources to distribute the
load evenly amongst their internal hash buckets.

To do this, you simply have to use several times the same server with a
different source. Example :

    listen 0.0.0.0:80
       mode tcp
       balance roundrobin
       server from1to1 10.1.1.1:80 source 10.1.2.1
       server from2to1 10.1.1.1:80 source 10.1.2.2
       server from3to1 10.1.1.1:80 source 10.1.2.3
       server from4to1 10.1.1.1:80 source 10.1.2.4
       server from5to1 10.1.1.1:80 source 10.1.2.5
       server from6to1 10.1.1.1:80 source 10.1.2.6
       server from7to1 10.1.1.1:80 source 10.1.2.7
       server from8to1 10.1.1.1:80 source 10.1.2.8


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