GitHub user ewerton-silva00 added a comment to the discussion: Cannot view vm 
instance console remotely - site Cannot be reached

> I certainly appreciate your response Ewerton,
> 
> You probably meant advanced networking, the zone should be core ...I'm using 
> Basic networking, since I only have one public IP. Internally I'm NATTED, 
> using 172.16.0.0/16
> 
> Quick look at my setup; H/W physical; KVM1 - 172.16.6.1 KVM2 - 172.16.6.2 
> KVM3 - 172.16.6.3 MGMT - 172.16.6.4
> 
> Management traffic - range 172.16.0.1 - 172.16.0.50
> 
> Zone GuestNetwork - range (Also configure with Source NAT IP addressing) 
> 172.16.0.51 - 172.16.0.150
> 
> Gateway 172.16.1.254
> 
> Egress/Ingress Rules Allow All for CIDR 0.0.0.0/0
> 
> That being said. Following the documentation. Egress rules from your security 
> groups are supposed to allow for "Console view" to work along with incoming 
> traffic, say I want to RDP into a windows instance over port 3389 from the 
> internet. I don't believe Cloudstack, was designed to go to that extreme to 
> get incoming traffic to work. If so, if surely would have been documented in 
> their guides/whitepapers. Seems these are all work-arounds, instead of 
> getting to work like the app should, ...the way it's documented.
> 
> Even other blogs state that the security group egress rules are all you need, 
> as long as you add the virtual router to your physical router and allow all 
> incoming. In my case, my virtual router is 172.16.0.95
> 
> **Since you are using Advanced networking, this won't work for me.
> 
> I'm looking for someone who has incoming traffic working with Basic 
> networking. Would like to review their setup**
> 
> Thanks again for your help, Mike

I also only have one public IPv4 address.

My entire environment is on a private network with CIDR 192.168.0.0/24.

My environment isn't very different from yours, and yet I can still access the 
instance consoles externally, as well as upload and download from the Secondary 
Storage VM.

GitHub link: 
https://github.com/apache/cloudstack/discussions/13295#discussioncomment-17351765

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