Hi
For ping monitoring, try going to Maintenance - Remote MGMT - then put a tick in ICMP LAN/WLAN and WAN and see if it now works. For some reason they've doubled up on the setting, 11 is still a BETA so I expect this will be cleaned up hopefully on the final release.
For your forwarding problem, is this to a Windows PC? If Yes the PC may have recognised some network changes and put it into the Public realm as a net work by default, usually on logging it will prompt, this prompt various depending on the Windows version, whereas it should be private unless you make firewall changes on the PC.
Regards
Phil