I tried to setup the nat, I can see my NAT and Security rule are being hit, but traffic is not flowing
Interface Swap (tested this with no swap too, and it didn;t work)
All of the 3 interfaces disabled src destination
all of them same sg, 0.0.0.0./0
eth0 and eth1 are on the same subnet (public) with a route 0.0.0.0/0 to igw
eth0 and eth1 both have a elastic ip attached
eth2 is on the private subnet, route 0.0.0.0/0 points to eth2
Server is on the same subnet as eth2
DHCP seems to pick up the proper IPs (internal ips)
My nat rule
Source: Trust -> Untrust
Source Translation: dynamic ip and port <<PRIVATE IP ADDRESS of eth1>>
Hit count: over 2000+
For my security rule
Universal, any, any, any .. any, allow. Hit count 3000+
Monitor shows "aged out", allowed, so it the traffic flows one way, but it doesn't come back!
Attached is a screenshot, the internal machine (172.31.73.88 pings google 126.96.36.199
172.31.38.193 is my eth1 "untrust"
Thanks in advance
Here's a request to google port 80
Solved! Go to Solution.
I made those changes
The nat is working if the trust ENI is on the same subnet than the server I'm trying to nat.
is there any way I can point other route tables to this ENI? I made the change but they can't connect to internet.
Excellent, that is a step in the right direction. Create a static route on the firewall VR to send all of the VPC subnets that are behind the firewall out of the Eth1/2 interface to the first IP in the firewall's Trust Subnet. AWS will then route it to the Server subnet.
I assume the Server subnet has a 0/0 route point to the Trust side of the firewall?
This is how my network looks like
Palo in Public
A same subnet that the trust interface, works fine
B diff subnet, same vpc, same Route Table, pointing to that ENI
For the route you mention, Unfortunately... I don't know how.. this is above the knowledge I have for this POC
This is why I tried
172.31.0.0/16 is my VPC CIDR
172.31.38.193 is the private IP of the "non trust interface"
what I learning experience!
My original routes
Then I added the VPC CIDR pointing to the "gateway of the trust interface" (Trust = 172.31.123.37)
Thanks for all your help, just documenting here if someone is on the same spot
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