HAProxy - basic authentication for backend server - haproxy

Question

I use the following configuration to access internet from local 127.0.0.1:2000 proxy to the internet.:
global
log 127.0.0.1 local0
log 127.0.0.1 local1 notice
#log loghost local0 info
maxconn 4096
#chroot /usr/share/haproxy
user haproxy
group haproxy
daemon
#debug
#quiet
defaults
log global
mode http
option httplog
option dontlognull
retries 3
option redispatch
maxconn 2000
contimeout 5000
clitimeout 50000
srvtimeout 50000
listen appname 0.0.0.0:2000
mode http
stats enable
acl white_list src 127.0.0.1
tcp-request content accept if white_list
tcp-request content reject
stats uri /haproxy?stats
stats realm Strictly\ Private
stats auth special_admin:special_username
balance roundrobin
option httpclose
option forwardfor
server lamp1 23.123.1.110:3128 check
Unfortunately I need to authenticate to my external proxy 23.123.1.110 via http basic authentication "special_admin:special_username".
My question is, is there any way to use basic authentication like :
server lamp1 http://special_admin:special_username#23.123.1.110:3128 check
Thanks

Answer 1

In your example you only need to add the necessary Authorization header with the authorization method and the username:password encoded as base64 like this:
reqadd Authorization:\ Basic\ c3BlY2lhbF9hZG1pbjpzcGVjaWFsX3VzZXJuYW1l
I created the base64 encoded string like this:
echo -n "special_admin:special_username" | base64
For more details about HTTP Basic authorization see https://en.wikipedia.org/wiki/Basic_access_authentication#Client_side

Answer 2

Below listed steps have worked for me.
# haproxy conf
global
log 127.0.0.1 local1
maxconn 4096
defaults
mode http
maxconn 2048
userlist AuthUsers
user admin password $6$SydPP/et7BGN$C5VIhcn6OxuIaLPhCDCmzJyqDYQF8skik3J6sApkXPa6YPSVGutcgQPpdX/VEycGNi3sw7NxLSflEb53gzJtA1
frontend nginx-frontend
bind *:5000
mode http
timeout connect 5s
timeout client 5s
timeout server 5s
default_backend nginx-backend
# For Path based basic authentication use this commented example
#acl PATH_cart path_beg -i /testing
#acl authusers_acl http_auth(AuthUsers)
#http-request auth realm nginx-backend if PATH_cart !authusers_acl
acl authusers_acl http_auth(AuthUsers)
http-request auth realm nginx-backend if !authusers_acl
backend nginx-backend
server nginx nginx:80 check inter 5s rise 2 fall 3
Install below package to generate hash password
sudo apt-get install whois
mkpasswd -m sha-512 'your_password'
mkpasswd -m sha-512 admin#456
expected output
$6$gnGNapo/XeXYg39A$T/7TDfMrZXUDPbv5UPYemrdxdh5xEwqBrzSbpJYs9rfxLbQtgQzxyzkSGWIVOEGze8KrsA0urh3/dG.1xOx3M0
Copy the generated password and paste in haproxy.cfg file
#Deploy the containers to test configuration
sudo docker run -d --name nginx nginx
sudo docker run -d -p 5000:5000 --name haproxy --link nginx:nginx -v /home/users/haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg haproxy
Check in the browser, username and password will be prompted.