Security :: Disable StrictHostKeyChecking For A DHCP And DNS-using Subnet

I have a VMware farm where:

- DHCP is in use to give machines IPs
- Machines go up and down all the time
- All IPs are on a certain subnet
- VMs update DNS (we don't go by IP)
- SSH is in use

I would like to disable StrictHostKeyChecking only for this subnet, because IPs change all the time and editing known_hosts usually only works for a few days before the IP changes again, and once I get enough entries, there are tons of conflicts.

I tried the following in ~/.ssh/config:

Code:
Host 10.0.217.*
StrictHostKeyChecking no
UserKnownHostsFile /dev/null

[Code]....