steps missing from VPN guide

[ToddKopriva]

Originally posted by @globeone in https://github.com/GoogleCloudPlatform/community/pull/335#issuecomment-489106626

https://cloud.google.com/community/tutorials/using-cloud-vpn-with-checkpoint

There is are a number of steps missing from this guide in the Policy Based Site to Site VPN on the Checkpoint side. With these steps the encryption domains will match and the connection will start.

Steps to create an Interoperable Device with the correct settings:

1. New... More... Network Object... More... Interoperable Device
2. General Properties... Name: GoogleCloudVPNGateway (or you can use the actual hostname)
3. IPv4 Address: 35.195.227.26
4. Topology
5. New...
6. Name: toGoogle
7. IPv4 Address: 35.195.227.26
8. Net Mask: 255.255.255.255
9. Topology the little horizontal tab at the top of the current dialog box
10. External (leads out to the Internet)
11. OK
12. New...
13. Name: toInternalNetwork
14. IPv4 Address: 10.0.0.0
15. Net Mask: 255.255.255.0
16. Topology
17. Internal (leads to the local network)
18. IP addresses behind this interface: Network defined by the interface IP and Netmask
19. OK
20. OK

[ToddKopriva]

@globeone, I created this separate bug report in the Issues section based on your comment on the original PR, so that we can track the work more easily.

[ToddKopriva]

@ashishverm , could you have a look at this issue regarding a document that you contributed?