My HW firewall block outgoing packets to avast,port 80,every 4 minutes! Why?

[REDACTED]

All work perfectly, but avast try to send packets from all my pc ports to his servers on port 80, my firewall is full of this line of log... can i disable this into avast? What avast trying to do?

...
TCP Packet - Source:10.11.12.12,51267 Destination:fra02-002.ff.avast.com,80 - [BLOCK]
TCP Packet - Source:10.11.12.12,51268 Destination:ams10-013.ff.avast.com,80 - [BLOCK]
TCP Packet - Source:10.11.12.12,51269 Destination:ams10-013.ff.avast.com,80 - [BLOCK]
TCP Packet - Source:10.11.12.12,51271 Destination:fra02-008.ff.avast.com,80 - [BLOCK]
...

Thanks for your help.
Elmar

[Asyn]

Looks like Avast is trying to connect to its stream-servers and you block it.

[REDACTED]

Exactly.
What kind of information is trying to send this freeware antivirus? My security are compromized? Noone know?
i reveive 300 of this alarm tonight:

TCP Packet - Source:10.11.12.11,57867 Destination:fra02-004.ff.avast.com,80 - [BLOCK]
TCP Packet - Source:10.11.12.11,57886 Destination:ams10-004.ff.avast.com,80 - [BLOCK]
TCP Packet - Source:10.11.12.11,57899 Destination:ams10-004.ff.avast.com,80 - [BLOCK]
TCP Packet - Source:10.11.12.11,57913 Destination:ams10-004.ff.avast.com,80 - [BLOCK]
TCP Packet - Source:10.11.12.11,57915 Destination:ams10-004.ff.avast.com,80 - [BLOCK]
TCP Packet - Source:10.11.12.11,57927 Destination:ams10-004.ff.avast.com,80 - [BLOCK]
...
...
...

[Asyn]

If you want Avast to work properly, you need to allow it to connect.

[Eddy]

A decent firewall is not just saying [BLOCK] but also will tell you why it is blocked.

And as Asyn said, setup your firewall correctly and let it allow everything from avast.