Foreman 1.4 running on RHEL 6.1 with a smart proxy running DNS, DHCP and TFTP services on RHEL 6.5
Running foreman proxy with DEBUG flag activated in settings.yml

When creating a new host, in the network form, select domain and after that subnet, the IP autosuggestion feature doesn't work. Apparently the proxy things that all the addresses in the range are busy but they aren't.

Output example at /var/log/foreman-proxy/proxy.log:

I, [2014-02-20T14:04:33.251753 #7693] INFO -- : Found a pingable IP address which does not have a Proxy::DHCP record
D, [2014-02-20T14:04:33.251873 #7693] DEBUG -- : Searching for free ip - pinging 172.20.13.252
I, [2014-02-20T14:04:33.252834 #7693] INFO -- : Found a pingable IP address which does not have a Proxy::DHCP record
D, [2014-02-20T14:04:33.253045 #7693] DEBUG -- : Searching for free ip - pinging 172.20.13.253
I, [2014-02-20T14:04:33.253961 #7693] INFO -- : Found a pingable IP address which does not have a Proxy::DHCP record
W, [2014-02-20T14:04:33.254088 #7693] WARN -- : No free IPs at 172.20.13.0/255.255.255.0
(END)

For the whole log see attached file.