IPSec VPN Tunnel only working one-way

There was a power outage at our remote site and since then the IPsec tunnel appears to only work in one direction. My remote users can access local resources, but I cannot so much as ping anything on the other side of the remote firewall. I am able to interface with the remote firewall through its web interface. I can also ping the remote devices from the remote firewall but not directly from my computer. We use a site-to-site IPsec VPN tunnel. The remote side is behind a NAT. The problem appears to be with the remote firewall, but I cannot see any policies that could be blocking my local computer from interfacing with the remote computers. The local and remote computers are on different subnets, but I have policies that should be allowing them to talk. I updated to the latest firmware update and no change either. The local firewall has not been updated. 

Any ideas on what the culprit could be?