1.经过调查，

2down voteaccepted
x-forwarded-for is an HTTP header field, so has nothing to do with the transport layer (TCP). Usually web proxies insert the x-forwarded-for data.

直接把# option forwardfor except 127.0.0.0/8
注释掉重启就行。
2.front和backend
#---------------------------------------------------------------------
frontend main *:5000
mode tcp
acl url_static path_beg -i /static /images /javascript /stylesheets
acl url_static path_end -i .jpg .gif .png .css .js

use_backend app if url_static
default_backend app

#---------------------------------------------------------------------

login frontend which proxys to the backends harbor login

#---------------------------------------------------------------------
frontend harbor_login
bind *:4430
mode tcp
option tcplog
default_backend harbor_login

#---------------------------------------------------------------------

round robin balancing between the various backends

#---------------------------------------------------------------------
backend app
mode tcp
balance roundrobin
server app1 172.16.6.50:5000 check

#---------------------------------------------------------------------

round robin balancing between the various backends

#---------------------------------------------------------------------
backend harbor_login
balance roundrobin
mode tcp
server harbor_login 172.16.6.50:443 check

最后

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