Script error when updating, only when behind reverse proxy

[thomasjsn]

Hi

I've found two actions that doesn't work when using the Zabbix front-end behind HAProxy:

Monitoring -> Maps -> Edit map -> Update

jsLoader.php?ver=3.4.4&lang=en_GB&showGuiMessaging=1&files[]=class.svg.canvas.js&files[]=class.svg.map.js&files[]=class.cmap.js&files[]=class.cviewswitcher.js&files[]=multiselect.js&files[]=servercheck.js:2461 Uncaught Error: Cannot update map.
    at Object.error (jsLoader.php?ver=3.4.4&lang=en_GB&showGuiMessaging=1&files[]=class.svg.canvas.js&files[]=class.svg.map.js&files[]=class.cmap.js&files[]=class.cviewswitcher.js&files[]=multiselect.js&files[]=servercheck.js:2461)
    at c (jsLoader.php?ver=3.4.4&lang=en_GB&showGuiMessaging=1:4978)
    at Object.fireWith [as rejectWith] (jsLoader.php?ver=3.4.4&lang=en_GB&showGuiMessaging=1:4978)
    at k (jsLoader.php?ver=3.4.4&lang=en_GB&showGuiMessaging=1:4980)
    at XMLHttpRequest.r (jsLoader.php?ver=3.4.4&lang=en_GB&showGuiMessaging=1:4980)

Configuration -> Hosts -> Toggle status on any host

Operation cannot be performed due to unauthorized request.

Both of these operations work just find when the Zabbix front-end is not behind HAproxy.

Any way around this? I've been unable to find any information about it.

Haproxy config:

defaults
        log     global
        mode    http
        option  httplog
        option  dontlognull
        option  forwardfor
        option  http-server-close

frontend www-public
    bind :::80 v4v6

    # monitor
    acl host_monitor hdr(host) -i monitor.my-domain
    acl path_zabbiz path_dir -i zabbix
    use_backend zabbix if host_monitor path_zabbiz

backend zabbix
    server vm-monitor vm-monitor.local-domain