GitHub user mjstark edited a comment on the discussion: Windows VM instance - 
No outbound OR inbound traffic working

Hi kiranchavala

Win 2025; OS of each instance shouldn't be relevant, as long as you disable the 
FW on the instance. Egress/Ingress rules of security groups don't care about 
the operating system.

That being said, I blew away Cloudstack and re-installed with advanced 
networking and using security groups.

Lets start from scratch starting with ZONE and CIDR. Here is my proposed 
configuration I would like to see. From a glance, this looks do-able. Let get 
the network setup properly first. Once setup, I will upload an ISO, install 
instance and apply/add security group with ingress/egress rules open.

**Proposed configuration;**

**ZONE: guest CIDR**
172.16.0.0/16
DNS 8.8.8.8
DNS 1.1.1.1

**default GUEST network (NAT)**
GW 172.16.0.1
SUB 255.255.0.0
RANGE 172.16.2.1 - 172.16.2.50

**POD**
reserved GW 172.16.0.1
reserved SUB 255.255.0.0
reserved range 172.16.3.1 - 172.16.2.25

**STORAGE**
GW 172.16.0.1
SUB 255.255.0.0
RANGE 172.16.4.1 - 172.16.4.20




Internal Network; Did this quick in P/B, so a bit messy, but the point is clear.

<img width="813" height="552" alt="image" 
src="https://github.com/user-attachments/assets/bd6f73d1-3456-4631-9184-0b5075b332d1";
 />

Thanks again.....

Let me know if you need any further information.

Kind Regards,
Mike

GitHub link: 
https://github.com/apache/cloudstack/discussions/13531#discussioncomment-17519134

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