Recently I deployed a new Horizon 7 environment and with it vROps for Horizon, when I first tried to pair the Broker agent with the Horizon adapter I received the following error.

Could not pair with the adapter address IP_ADDRESS. An error has occurred. Failed to pair the adapter. Operation adaptor pairing has failed.

I was using the default port and DNS was working. The issue here was the firewall rules needed to be updated on the appliance after the Horizon Adapter was installed, this looks to be from Horizon Adapter v6.2 onwards (I was using 6.3). VMware KB.

First enable SSH on the appliance, logon to the console and run

> service sshd start

Then edit /opt/vmware/etc/vmware-vcops-firewall.conf. Edit and add the following

TCPPORTS=”$TCPPORTS 3091:3095″
TCPPORTS=”$TCPPORTS 3099:3101″

Save the file and restart the services

>/etc/init.d/vmware-vcops-firewall restart

Pairing now works fine