Duo Push not working on Citrix Receiver

On the F5 create a new Radius access profile in Access  ››  Authentication : RADIUS with a custom port. I am assuming you are already using Radius port 1812 for the traditional iFrame with your Citrix Access Policy. After you create this open the branch in your Citrix Access Policy for Workspace click the plus sign in front of your resource box that has your DDCs, choose the authentication tab and add the Radius auth policy. For the AAA Server drop-down menu choose the profile you created

You need to set up the DUO authproxy.cfg file with the stanza [radius_server_auto] 

For example:

[radius_server_auto2]
ikey=xxxxxxx
skey=xxxxxxxxx
api_host=xxxxxx.duosecurity.com
radius_ip_8=<F5 Self IPs>
radius_secret_8=xxxxxxx
radius_ip_9=<F5 Self IPs>
radius_secret_9=xxxxxx
port=<Port Number> Change this so it doesnt conflict with your iFrame setup
client=<LDAP AUth>
failmode=safe

This should send an automatic push.