net-client on Kerio Winroute Firewall proxy

why could i or not install the net-agent on my Kerio Winroute Firewall? I use it as proxy. could it reduce the performance too much? In my society there are 1500 PC…
Thank you for your support,
Michele

Who said you can not install it?

The performance degradation you are afraid of is probably not caused by avast after installation but by the 1500 pc’s trying to make connections over 1 server machine.
If you also configure the client correctly (make the right net-client package with subcomponents) i dont see any problems with installing the net-client