How to access a domain server which is targeted by Group Policy set to block Inbound and Outbound connections

Question

Hi,
I have a practice lab with two physical servers 2012 R2, one of them is Hyper-V host and one of VMs is a domain controller. I was doeing some exercises with firewall rule deployment through Group Policy, so I created an outbound rule to block port 80 which
was targeted to Domain Computers. Now my other physical server has inbound and outbound connections set to block and domain controller cannot be contacted to update policy ( with rule removed ). At least that is my understanding. Maybe I messed up something
with the profiles too, because port 80 would not have block all outband traffic, or?
I am new to IT so my understanding is still poor.
Best
Robert

Answer 1

Hi Robert,
If we block inbound connections, all connections that do not have firewall rules that explicitly allow the connection will be blocked.
If we block outbound connections, all connections that do not have firewall rules that explicitly allow the connection will be blocked.
If we block outbound TCP port 80, it will mean all websites will be unreachable, for TCP port 80 is for HTTP.
Regarding Windows firewall security settings, the following article can be referred to for more information.
Windows Firewall with Advanced Security Properties Page
http://technet.microsoft.com/en-us/library/cc753002.aspx
Best regards,
Frank Shen