Local cluster connectivity from the VM

[leokondrashov]

Describe the bug
Connectivity to other services in the cluster is broken.

To Reproduce
Create a VM with network manager. Ping the other nodes in the cluster from the guest.

Expected behavior
Successful pings to other nodes in the cluster.

[leokondrashov]

The problem is a lack of masquerade rules for the NICs other than the external one. The solution would be to add masq rules for all physical interfaces or remove the destination interface from the condition entirely.