If you are in the Policy Manager add a policy, select custom, new...  Give it a name and click Add...  Under Protocols select Any and click OK.  Click Add... button.  Open up the policy you just created and add your miners ip addresses in the From section or you can just add your entire network.  Add Any to the To section.  Make sure the security stuff is unselected like Application Control and IPS and then click OK.  Check the positioning of the rule and move it to the top if it's not there already.  Save the config and you should be good to go.