haproxy config, exchange 2010

#/******************************************************/
# Exchange 2010 HAProxy Config | Updated 02/26/2020
#/******************************************************/

global
        setenv exchange1 10.x.x.120
        setenv exchange2 10.x.x.121
        log /dev/log local0 debug
        maxconn 4096
        pidfile /var/run/haproxy.pid
        uid 99
        gid 99
        daemon
        debug
        ssl-server-verify none
        stats socket /var/run/haproxy.stat

defaults
        log global
        retries 3
        maxconn 1000
        timeout connect 500s
        timeout client 600s
        timeout server 600s
        timeout connect 30s

listen stats
        bind *:8080
        mode http
        stats enable
        stats hide-version
        stats uri /s
        stats realm HAProxy\ Statistics

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frontend CAS-HTTP
        mode tcp
        bind :80
                option tcplog
        default_backend CAS-HTTP

backend CAS-HTTP
        balance leastconn
        option redispatch
        option abortonclose
        stick on src
        stick-table type ip size 10240k expire 240m
        option httpchk HEAD / HTTP/1.0
        server CAS1 $exchange1 check port 80 inter 5000 rise 2 fall 2
        server CAS2 $exchange2 check port 80 inter 5000 rise 2 fall 2
#/******************************************************/

frontend CAS-HTTPS
        mode tcp
        bind :443
                option tcplog
        default_backend CAS-HTTPS

backend CAS-HTTPS
        balance leastconn
        option redispatch
        option abortonclose
        stick on src
        stick-table type ip size 10240k expire 240m
        option httpchk HEAD / HTTP/1.0
        server CAS1 $exchange1 check port 443 check-ssl inter 5000 rise 2 fall 2
        server CAS2 $exchange2 check port 443 check-ssl inter 5000 rise 2 fall 2
#/******************************************************/

frontend CAS-SMTP
        mode tcp
        bind :25
        default_backend CAS-SMTP

backend CAS-SMTP
        option redispatch
        option abortonclose
        balance leastconn
        server CAS1 $exchange1 check port 25 inter 5000 rise 2 fall 2
        server CAS2 $exchange2 check port 25 inter 5000 rise 2 fall 2
#/******************************************************/

frontend CAS-SMTPS
        mode tcp
        bind :587
        default_backend CAS-SMTPS

backend CAS-SMTPS
        option redispatch
        option abortonclose
        balance leastconn
        server CAS1 $exchange1 check port 587 inter 5000 rise 2 fall 2
        server CAS2 $exchange2 check port 587 inter 5000 rise 2 fall 2
#/******************************************************/

frontend CAS-SMTP-5555
        mode tcp
        bind :5555
        default_backend CAS-SMTP-5555

backend CAS-SMTP-5555
        option redispatch
        option abortonclose
        balance leastconn
        server CAS1 $exchange1 check port 5555 inter 5000 rise 2 fall 2
        server CAS2 $exchange2 check port 5555 inter 5000 rise 2 fall 2
#/******************************************************/

frontend CAS-SMTP-2525
        mode tcp
        bind :5555
        default_backend CAS-SMTP-2525

backend CAS-SMTP-2525
        option redispatch
        option abortonclose
        balance leastconn
        server CAS1 $exchange1 check port 2525 inter 5000 rise 2 fall 2
        server CAS2 $exchange2 check port 2525 inter 5000 rise 2 fall 2
#/******************************************************/

frontend CAS-RPC-EndPointMapper
        mode tcp
        bind :135 name epm tcp-ut 30s
        default_backend CAS-RPC-EndPointMapper

backend CAS-RPC-EndPointMapper
        balance leastconn
        option tcp-check
                tcp-check connect port 135
        default-server on-marked-down shutdown-sessions
        server CAS1 $exchange1 check
        server CAS2 $exchange2 check
#/******************************************************/

frontend CAS-RPC-Mapi
        mode tcp
        bind :60001 name mapi tcp-ut 30s
        default_backend CAS-RPC-Mapi

backend CAS-RPC-Mapi
        balance leastconn
        option tcp-check
                tcp-check connect port 60001
        default-server on-marked-down shutdown-sessions
        server CAS1 $exchange1 check
        server CAS2 $exchange2 check
#/******************************************************/

frontend CAS-RPC-AddressBook
        mode tcp
        bind :60002 name addressbook tcp-ut 30s
        default_backend CAS-RPC-AddressBook

backend CAS-RPC-AddressBook
        balance leastconn
        option tcp-check
                tcp-check connect port 60002
        default-server on-marked-down shutdown-sessions
        server CAS1 $exchange1 check
        server CAS2 $exchange2 check
#/******************************************************/