Firewall Settings

I’m new to Avast and so far very impressed … well done guys (& gals).
Can someone please confirm what parts need access to the internet and the relevant ip addresses as the entries showing up in my firewall logs differ from those shown in the avast help file!
Cheers

ashWebSv.exe
ashMaiSv.exe
ashUpdSv.exe
avast.setup

Thanks DavidR for your help.
Does anyone know the allocated ip’s?

ashUpdSv.exe must be able to connect to all servers defined in servres.def
ashMaiSv.exe must be able to connect to your mail provider
ashWebSv.exe scans all http trafic (and more?)

not sure about avast.setup, but I think it is the same as for ashUpdSv.exe