My Svchost.exe was connecting to 255.255.255.255:67, I checked and port 67 is Bootstrap Protocol Server is this supposed to connect to the internet?
ps could someone list all the ports that svchost.exe uses so I have a printed reference for future inquiries, thankyou for the help
Please note the IP address it’s connecting to - 255.255.255.255. This is your local LAN broadcast address, not the internet. It’s OK to allow this.
Ewen 
Here is a list of TCP and UDP ports:
:SMLR
Most commonly (for things you want - and maybe need - to allow) svchost.exe will connect to Outbound Destination Ports 80,443 (Windows Updates), 53 (DNS - to identify/name IP addresses), 67 (DHCP - establish IP address & internet connetion), and 123 (Timeserver).
You will also see some Inbound (probably won’t need a special rule for it) for svchost.exe to Destination Port 68. This is also for DHCP and is part of the process for establishing/updating your IP address and maintaining your internet connection.
Hope that helps,
LM